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Discerningly Versed - Effective Iterative Learning Quiz Questions - Oxide Minerals II
Discerningly Versed - Effective Iterative Learning


A reddish-yellow variety of chalcedony used as a gemstone is

 

Opal
Carnelian
Onyx
Citrine

 A variety of chalcedony with alternating black and white bands used as a gemstone is

 

Opal
Carnelian
Onyx
Citrine
Which oxide mineral is the chief source of aluminium ?

 

Brucite
Bauxite
Limonite
Gibbsite

 Known as false topaz, a brownish-yellow variety of quartz and a gemstone is

 

Opal
Carnelian
Onyx
Citrine
Rock crystal is a pure transparent variety of which mineral ?

 

Quartz
Chalcedony
Corundum
Opal

 Sapphire is a blue variety of which oxide mineral ?

 

Corundum
Opal
Hematite
Spinel
An amorphous form of hydrated silicon dioxide used as a gemstone is

 

Opal
Carnelian
Onyx
Citrine

 Fire opal, used as a gemstone, is what colour ?

 

Yellow
Black
Orange Red
Green
Which of these pairs of minerals are oxides and NOT hydroxides ?

 

Bauxite Diaspore
Geotite Brucite
Limonite Manganite
Chalcedony Quartz

 Chryoprase is an apple green variety of which mineral used as a gemstone ?

 

Quartz
Chalcedony
Corundum
Opal


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