Purple quartz.
Blue to blue-green beryl coloured by iron.
Apple-green chalcedony coloured by nickel.
Yellow to orange quartz.
Green beryl coloured by chromium and vanadium.
A family of gems from deep red to vivid green.
Gem corundum in every colour except red.
A hard, bright gem; blue topaz is usually irradiated and heated.
A gem family found in every colour, often in one crystal.
The collection
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