Multicoloured Crystals

Description

Answer

Rare feldspar; pieces with little iridescence tend to be a grayish colour; named after the region (Province) of Canada where it was discovered; has the effect of "labradorescence"

Common ore of copper; aka peacock ore; brassy yellow when unweathered; usually found in massive form; hardness around 3.5 - 4

Many types of this stone: Andean, Cherry, Dark, Fire, Common, White, Tree, etc.; delicate mineral

Tends to crystallize in hard rocks like quartz or granite; many types: Rubellite, Watermelon, Verdelite, Uvite, Achroite, Elbaite, etc.

Description

Answer

Though not a true stone, the fossilized version can be considered a mineral/gemstone; formed from the skeletal remains of colonies of small sea animals and polyps; alive form is endangered

Gem made by a living creature; hard to find in wild; soft; can be found in freshwater or from the sea; usually develops when part of a shell enters a mollusk; varieties include: Akoya, Tahitian, White, Golden South Sea, etc.

Has a swirling contrast of colours - dynamic sinuous pattern; derives from layers of sand/silt that have been cemented by quartz in the form of blue falcon's eye and yellow gold tiger eye

Mixture of pink feldspars, quartz, and green epidote; appearance has contrasting areas of pink and green; usually seen in the form of beads, tumbled stones, or cabochons