smaragd

smaragd (nominative singular)
smaragdy (nominative plural)
smaragdu (genitive singular)
smaragdů (genitive plural)
smaragdu (dative singular)
smaragdům (dative plural)
smaragd (accusative singular)
smaragdy (accusative plural)
smaragde (singular vocative)
smaragdy (plural vocative)
smaragdu (locative singular)
smaragdech (locative plural)
smaragdem (instrumental singular)
smaragdy (instrumental plural)


diamant

diamant (nominative singular)
diamanty (nominative plural)
diamantu (genitive singular)
diamantů (genitive plural)
diamantu (dative singular)
diamantům (dative plural)
diamant (accusative singular)
diamanty (accusative plural)
diamante (singular vocative)
diamanty (plural vocative)
diamantu (locative singular)
diamantech (locative plural)
diamantem (instrumental singular)
diamanty (instrumental plural)

Borrowed from French and Old French diamant.


safír

safír (nominative singular)
safíry (nominative plural)
safíru (genitive singular)
safírů (genitive plural)
safíru (dative singular)
safírům (dative plural)
safír (accusative singular)
safíry (accusative plural)
safíre (singular vocative)
safíry (plural vocative)
safíru (locative singular)
safírech (locative plural)
safírem (instrumental singular)
safíry (instrumental plural)


kasiterit

kasiterit (nominative singular)
kasiterity (nominative plural)
kasiteritu (genitive singular)
kasiteritů (genitive plural)
kasiteritu (dative singular)
kasiteritům (dative plural)
kasiterit (accusative singular)
kasiterity (accusative plural)
kasiterite (singular vocative)
kasiterity (plural vocative)
kasiteritu (locative singular)
kasiteritech (locative plural)
kasiteritem (instrumental singular)
kasiterity (instrumental plural)


hematit

hematit (nominative singular)
hematity (nominative plural)
hematitu (genitive singular)
hematitů (genitive plural)
hematitu (dative singular)
hematitům (dative plural)
hematit (accusative singular)
hematity (accusative plural)
hematite (singular vocative)
hematity (plural vocative)
hematitu (locative singular)
hematitech (locative plural)
hematitem (instrumental singular)
hematity (instrumental plural)


klenot

klenot (nominative singular)
klenoty (nominative plural)
klenotu (genitive singular)
klenotů (genitive plural)
klenotu (dative singular)
klenotům (dative plural)
klenot (accusative singular)
klenoty (accusative plural)
klenote (singular vocative)
klenoty (plural vocative)
klenotu (locative singular)
klenotech (locative plural)
klenotem (instrumental singular)
klenoty (instrumental plural)


ametyst

ametyst (nominative singular)
ametysty (nominative plural)
ametystu (genitive singular)
ametystů (genitive plural)
ametystu (dative singular)
ametystům (dative plural)
ametyst (accusative singular)
ametysty (accusative plural)
ametyste (singular vocative)
ametysty (plural vocative)
ametystu (locative singular)
ametystech (locative plural)
ametystem (instrumental singular)
ametysty (instrumental plural)


slída

slídový (adjective relational)
slída (nominative singular)
slídy (nominative plural)
slídy (genitive singular)
slíd (genitive plural)
slídě (dative singular)
slídám (dative plural)
slídu (accusative singular)
slídy (accusative plural)
slído (singular vocative)
slídy (plural vocative)
slídě (locative singular)
slídách (locative plural)
slídou (instrumental singular)
slídami (instrumental plural)

Cognate with Slovak sľuda and Russian слюда (sljuda).


sádrovec

sádrovec (nominative singular)
sádrovce (nominative plural)
sádrovce (genitive singular)
sádrovců (genitive plural)
sádrovci (dative singular)
sádrovcům (dative plural)
sádrovec (accusative singular)
sádrovce (accusative plural)
sádrovci (singular vocative)
sádrovce (plural vocative)
sádrovci (locative singular)
sádrovcích (locative plural)
sádrovcem (instrumental singular)
sádrovci (instrumental plural)


křemen

křemen (nominative singular)
křemeny (nominative plural)
křemenu (genitive singular)
křemene (genitive singular)
křemenů (genitive plural)
křemenu (dative singular)
křemeni (dative singular)
křemenům (dative plural)
křemen (accusative singular)
křemeny (accusative plural)
křemeni (singular vocative)
křemeny (plural vocative)
křemeni (locative singular)
křemenu (locative singular)
křemenech (locative plural)
křemenem (instrumental singular)
křemeny (instrumental plural)

Inherited from Old Czech křemen, from Proto-Slavic *kremy.


štěpnost

štěpnost (nominative singular)
štěpnosti (nominative plural)
štěpnosti (genitive singular)
štěpností (genitive plural)
štěpnosti (dative singular)
štěpnostem (dative plural)
štěpnost (accusative singular)
štěpnosti (accusative plural)
štěpnosti (singular vocative)
štěpnosti (plural vocative)
štěpnosti (locative singular)
štěpnostech (locative plural)
štěpností (instrumental singular)
štěpnostmi (instrumental plural)


halit

halit (nominative singular)
hality (nominative plural)
halitu (genitive singular)
halitů (genitive plural)
halitu (dative singular)
halitům (dative plural)
halit (accusative singular)
hality (accusative plural)
halite (singular vocative)
hality (plural vocative)
halitu (locative singular)
halitech (locative plural)
halitem (instrumental singular)
hality (instrumental plural)


tyrkys

cs-noun

tyrkys m inan (relational adjective tyrkysový)

tyrkysový (adjective relational)
tyrkys (nominative singular)
tyrkysy (nominative plural)
tyrkysu (genitive singular)
tyrkysů (genitive plural)
tyrkysu (dative singular)
tyrkysům (dative plural)
tyrkys (accusative singular)
tyrkysy (accusative plural)
tyrkyse (singular vocative)
tyrkysy (plural vocative)
tyrkysu (locative singular)
tyrkysech (locative plural)
tyrkysem (instrumental singular)
tyrkysy (instrumental plural)


tuha

tuha (nominative singular)
tuhy (nominative plural)
tuhy (genitive singular)
tuh (genitive plural)
tuze (dative singular)
tuhám (dative plural)
tuhu (accusative singular)
tuhy (accusative plural)
tuho (singular vocative)
tuhy (plural vocative)
tuze (locative singular)
tuhách (locative plural)
tuhou (instrumental singular)
tuhami (instrumental plural)

likely form dialectal german "duchstein", "tugstein" or "tuffstein".


achát

achát (nominative singular)
acháty (nominative plural)
achátu (genitive singular)
achátů (genitive plural)
achátu (dative singular)
achátům (dative plural)
achát (accusative singular)
acháty (accusative plural)
acháte (singular vocative)
acháty (plural vocative)
achátu (locative singular)
achátech (locative plural)
achátem (instrumental singular)
acháty (instrumental plural)


drahokam

drahokam (nominative singular)
drahokamy (nominative plural)
drahokamu (genitive singular)
drahokamů (genitive plural)
drahokamu (dative singular)
drahokamům (dative plural)
drahokam (accusative singular)
drahokamy (accusative plural)
drahokame (singular vocative)
drahokamy (plural vocative)
drahokamu (locative singular)
drahokamech (locative plural)
drahokamem (instrumental singular)
drahokamy (instrumental plural)


rubín

rubín (nominative singular)
rubíny (nominative plural)
rubínu (genitive singular)
rubínů (genitive plural)
rubínu (dative singular)
rubínům (dative plural)
rubín (accusative singular)
rubíny (accusative plural)
rubíne (singular vocative)
rubíny (plural vocative)
rubínu (locative singular)
rubínech (locative plural)
rubínem (instrumental singular)
rubíny (instrumental plural)


opál

opál (nominative singular)
opály (nominative plural)
opálu (genitive singular)
opálů (genitive plural)
opálu (dative singular)
opálům (dative plural)
opál (accusative singular)
opály (accusative plural)
opále (singular vocative)
opály (plural vocative)
opálu (locative singular)
opálech (locative plural)
opálem (instrumental singular)
opály (instrumental plural)

(mineralogy) opal (a mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity)


biotit

biotit (nominative singular)
biotity (nominative plural)
biotitu (genitive singular)
biotitů (genitive plural)
biotitu (dative singular)
biotitům (dative plural)
biotit (accusative singular)
biotity (accusative plural)
biotite (singular vocative)
biotity (plural vocative)
biotitu (locative singular)
biotitech (locative plural)
biotitem (instrumental singular)
biotity (instrumental plural)


kaolinit

kaolinit (nominative singular)
kaolinity (nominative plural)
kaolinitu (genitive singular)
kaolinitů (genitive plural)
kaolinitu (dative singular)
kaolinitům (dative plural)
kaolinit (accusative singular)
kaolinity (accusative plural)
kaolinite (singular vocative)
kaolinity (plural vocative)
kaolinitu (locative singular)
kaolinitech (locative plural)
kaolinitem (instrumental singular)
kaolinity (instrumental plural)


chalcedon

chalcedony (form of fine-grained quartz that is nearly transparent or has a milky translucence)


turmalín

turmalín (nominative singular)
turmalíny (nominative plural)
turmalínu (genitive singular)
turmalínů (genitive plural)
turmalínu (dative singular)
turmalínům (dative plural)
turmalín (accusative singular)
turmalíny (accusative plural)
turmalíne (singular vocative)
turmalíny (plural vocative)
turmalínu (locative singular)
turmalínech (locative plural)
turmalínem (instrumental singular)
turmalíny (instrumental plural)


smirek

smirek (nominative singular)
smirky (nominative plural)
smirku (genitive singular)
smirků (genitive plural)
smirku (dative singular)
smirkům (dative plural)
smirek (accusative singular)
smirky (accusative plural)
smirku (singular vocative)
smirky (plural vocative)
smirku (locative singular)
smircích (locative plural)
smirkem (instrumental singular)
smirky (instrumental plural)


malachit

malachit (nominative singular)
malachity (nominative plural)
malachitu (genitive singular)
malachitů (genitive plural)
malachitu (dative singular)
malachitům (dative plural)
malachit (accusative singular)
malachity (accusative plural)
malachite (singular vocative)
malachity (plural vocative)
malachitu (locative singular)
malachitech (locative plural)
malachitem (instrumental singular)
malachity (instrumental plural)


aragonit

aragonit (nominative singular)
aragonity (nominative plural)
aragonitu (genitive singular)
aragonitů (genitive plural)
aragonitu (dative singular)
aragonitům (dative plural)
aragonit (accusative singular)
aragonity (accusative plural)
aragonite (singular vocative)
aragonity (plural vocative)
aragonitu (locative singular)
aragonitech (locative plural)
aragonitem (instrumental singular)
aragonity (instrumental plural)


cínovec

cínovec (nominative singular)
cínovce (nominative plural)
cínovce (genitive singular)
cínovců (genitive plural)
cínovci (dative singular)
cínovcům (dative plural)
cínovec (accusative singular)
cínovce (accusative plural)
cínovci (singular vocative)
cínovce (plural vocative)
cínovci (locative singular)
cínovcích (locative plural)
cínovcem (instrumental singular)
cínovci (instrumental plural)


kruchý

kruchý (masculine nominative singular)
kruchá (feminine nominative singular)
kruché (neuter nominative singular)
kruchého (genitive masculine singular)
kruché (feminine genitive singular)
kruchého (genitive neuter singular)
kruchému (dative masculine singular)
kruché (dative feminine singular)
kruchému (dative neuter singular)
kruchého (accusative animate masculine singular)
kruchý (accusative inanimate masculine singular)
kruchou (accusative feminine singular)
kruché (accusative neuter singular)
kruchém (locative masculine singular)
kruché (feminine locative singular)
kruchém (locative neuter singular)
kruchým (instrumental masculine singular)
kruchou (feminine instrumental singular)
kruchým (instrumental neuter singular)
kruší (animate masculine nominative plural)
kruché (feminine nominative)
kruché (inanimate nominative)
kruchá (neuter nominative plural)
kruchých (genitive plural)
kruchým (dative plural)
kruché (accusative feminine plural)
kruchá (accusative neuter plural)
kruchých (locative plural)
kruchými (instrumental plural)

V přírodě nachází se [Cu₂S] co řezek čili mědileštěn[…] Přirozený je měkký a kruchý, nožem strouhatelný, odtud jméno.

1860, Vojtěch Šafařík, Základové chemie čili lučby, V Praze: Matice česká, page 324:

Hovoříme např. o minerálech kujných, […], měkkých, […], a kruchých neboli křehkých, drobivých, které se po úderu rozletují ve formě úlomků (např. pyrit, křemen).

1997, Rudolf Ďuďa, Luboš Rejl, Minerály (Velký průvodce), Praha: Aventinum nakladatelství, →ISBN, page 18:


kruchost

kruchost (nominative singular)
kruchosti (nominative plural)
kruchosti (genitive singular)
kruchostí (genitive plural)
kruchosti (dative singular)
kruchostem (dative plural)
kruchost (accusative singular)
kruchosti (accusative plural)
kruchosti (singular vocative)
kruchosti (plural vocative)
kruchosti (locative singular)
kruchostech (locative plural)
kruchostí (instrumental singular)
kruchostmi (instrumental plural)

11. Zinckenit celistvý nebo vláknitý, obyčejně pospolu s Boulangeritem, od něhož i bez rozboru liší se menši kruchostí, silnějším kovovým leskem a menši hutností, nezdá se býti příliš vzácný.

1895, Bedřich Katzer, “Rudní obor Kutnohorský.”, in Rozpravy České akademie císaře Františka Josefa pro vědy, slovesnost a umění (Třída II, Mathematicko-přírodnická), volume IV., number 31., Praha: Česká akademie císaře Františka Josefa pro vědy slovesnost a umění, →ISSN, page 32:

Z dalších fysikálních vlastností, které mají i praktický význam při těžbě, jsou důležitější zejména tvrdost, pevnost a kruchost uhlí.

1963, Jan Petránek, Usazené horniny: jejich složení, vznik a ložiska, Praha: Nakladatelství Československé akademie věd, →OCLC, page 542:

in specialist usage
(mineralogy) brittleness


klouzek

klouzek m inan or (colloquial, expressive) m anim

expressive (colloquial)
klouzek (nominative singular)
klouzky (nominative plural)
klouzka (genitive singular)
klouzku (genitive singular)
klouzků (genitive plural)
klouzku (dative singular)
klouzkům (dative plural)
klouzka (accusative singular)
klouzek (accusative singular)
klouzky (accusative plural)
klouzku (singular vocative)
klouzky (plural vocative)
klouzku (locative singular)
klouzcích (locative plural)
klouzkem (instrumental singular)
klouzky (instrumental plural)
klouzek (nominative singular)
klouzci (nominative plural)
klouzka (genitive singular)
klouzků (genitive plural)
klouzkovi (dative singular)
klouzku (dative singular)
klouzkům (dative plural)
klouzka (accusative singular)
klouzky (accusative plural)
klouzku (singular vocative)
klouzci (plural vocative)
klouzkovi (locative singular)
klouzku (locative singular)
klouzcích (locative plural)
klouzkem (instrumental singular)
klouzky (instrumental plural)


minerál

minerál (nominative singular)
minerály (nominative plural)
minerálu (genitive singular)
minerálů (genitive plural)
minerálu (dative singular)
minerálům (dative plural)
minerál (accusative singular)
minerály (accusative plural)
minerále (singular vocative)
minerály (plural vocative)
minerále (locative singular)
minerálu (locative singular)
minerálech (locative plural)
minerálem (instrumental singular)
minerály (instrumental plural)


nerost

nerost (nominative singular)
nerosty (nominative plural)
nerostu (genitive singular)
nerostů (genitive plural)
nerostu (dative singular)
nerostům (dative plural)
nerost (accusative singular)
nerosty (accusative plural)
neroste (singular vocative)
nerosty (plural vocative)
nerostu (locative singular)
nerostech (locative plural)
nerostem (instrumental singular)
nerosty (instrumental plural)


krušec

krušec (nominative singular)
krušce (nominative plural)
krušce (genitive singular)
krušců (genitive plural)
krušci (dative singular)
krušcům (dative plural)
krušec (accusative singular)
krušce (accusative plural)
krušci (singular vocative)
krušce (plural vocative)
krušci (locative singular)
krušcích (locative plural)
krušcem (instrumental singular)
krušci (instrumental plural)

From Old Czech krušec (“lump of a useful mineral, especially rock salt”), krušek, from kruch (“piece, chunk”), from Proto-Slavic *kruxъ, from Proto-Balto-Slavic *kraušas, from Proto-Indo-European *krows-o-s, ultimately from *krews- (“to freeze, become hard”).


mastek

mastek (nominative singular)
mastky (nominative plural)
mastku (genitive singular)
mastků (genitive plural)
mastku (dative singular)
mastkům (dative plural)
mastek (accusative singular)
mastky (accusative plural)
mastku (singular vocative)
mastky (plural vocative)
mastku (locative singular)
mastcích (locative plural)
mastkem (instrumental singular)
mastky (instrumental plural)


karmeltazit

karmeltazit (nominative singular)
karmeltazity (nominative plural)
karmeltazitu (genitive singular)
karmeltazitů (genitive plural)
karmeltazitu (dative singular)
karmeltazitům (dative plural)
karmeltazit (accusative singular)
karmeltazity (accusative plural)
karmeltazite (singular vocative)
karmeltazity (plural vocative)
karmeltazitu (locative singular)
karmeltazitech (locative plural)
karmeltazitem (instrumental singular)
karmeltazity (instrumental plural)


vřídlovec

vřídlovec (nominative singular)
vřídlovce (nominative plural)
vřídlovce (genitive singular)
vřídlovců (genitive plural)
vřídlovci (dative singular)
vřídlovcům (dative plural)
vřídlovec (accusative singular)
vřídlovce (accusative plural)
vřídlovci (singular vocative)
vřídlovce (plural vocative)
vřídlovci (locative singular)
vřídlovcích (locative plural)
vřídlovcem (instrumental singular)
vřídlovci (instrumental plural)

a variety of aragonite formed by precipitation from hot mineral springs


baryt

baryt (nominative singular)
baryty (nominative plural)
barytu (genitive singular)
barytů (genitive plural)
barytu (dative singular)
barytům (dative plural)
baryt (accusative singular)
baryty (accusative plural)
baryte (singular vocative)
baryty (plural vocative)
barytu (locative singular)
barytech (locative plural)
barytem (instrumental singular)
baryty (instrumental plural)


kyz

kyz (nominative singular)
kyzy (nominative plural)
kyzu (genitive singular)
kyzů (genitive plural)
kyzu (dative singular)
kyzům (dative plural)
kyz (accusative singular)
kyzy (accusative plural)
kyze (singular vocative)
kyzy (plural vocative)
kyzu (locative singular)
kyzech (locative plural)
kyzem (instrumental singular)
kyzy (instrumental plural)


kazivec

cs-noun

kazivec m inan (relational adjective kazivcový)

kazivcový (adjective relational)
kazivec (nominative singular)
kazivce (nominative plural)
kazivce (genitive singular)
kazivců (genitive plural)
kazivci (dative singular)
kazivcům (dative plural)
kazivec (accusative singular)
kazivce (accusative plural)
kazivci (singular vocative)
kazivce (plural vocative)
kazivci (locative singular)
kazivcích (locative plural)
kazivcem (instrumental singular)
kazivci (instrumental plural)

Coined by Bohemian botanist Jan Svatopluk Presl from kazivý + -ec.


akvamarín

cs-noun

akvamarín m inan (relational adjective akvamarínový)

akvamarínový (adjective relational)
akvamarín (nominative singular)
akvamaríny (nominative plural)
akvamarínu (genitive singular)
akvamarínů (genitive plural)
akvamarínu (dative singular)
akvamarínům (dative plural)
akvamarín (accusative singular)
akvamaríny (accusative plural)
akvamaríne (singular vocative)
akvamaríny (plural vocative)
akvamarínu (locative singular)
akvamarínech (locative plural)
akvamarínem (instrumental singular)
akvamaríny (instrumental plural)

From German Aquamarin, from Latin aqua (“water”) + marinus (“marine”).

(mineralogy) aquamarine (bluish-green variety of beryl)


chalkopyrit

chalkopyrit (nominative singular)
chalkopyrity (nominative plural)
chalkopyritu (genitive singular)
chalkopyritů (genitive plural)
chalkopyritu (dative singular)
chalkopyritům (dative plural)
chalkopyrit (accusative singular)
chalkopyrity (accusative plural)
chalkopyrite (singular vocative)
chalkopyrity (plural vocative)
chalkopyritu (locative singular)
chalkopyritech (locative plural)
chalkopyritem (instrumental singular)
chalkopyrity (instrumental plural)

From Ancient Greek χαλκός (khalkós, “copper”) + Latin pȳritēs, from Ancient Greek πυρίτης λίθος (purítēs líthos, “stone of fire, flint”)

der

πυρίτης λίθος