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Can you choose the right mineral based on the basic descriptions given?
This mineral has a hardness of 7 MOHs, can be found as hexagonal prisms terminated by pyramids, and produces a conchoidal fracture. Well know varieties include Amethyst and Citrine
Olive green coloured mineral that makes up a large proportion of the Earths mantle
Colourless-White growing in cubic crystals. More commonly known as rock salt as has a salty taste
Octahedral crystals that fluoresce under UV light
A vitreous colourless mineral that displays rhombic cleavage and effervesces with HCl
A metallic grey mineral that forms in cubes and has a high density of around 7.5g/cm3
Fibrous kidney shaped masses that appear dull metallic, however produce a cherry red streak when scratched
Hard mineral of 9 MOHs that forms the base for rubies and sapphires
Metallic brass yellow mineral found in mafic volcanic rocks, with the chemical formula CuFeS2
Blue-green microcrystalline structures formed from hydrated copper aluminium phosphate
Ranked 8 on Mohs' scale of mineral hardness, this translucent mineral is a very attractive pinkish-brown colour
Composed from beryllium aluminium silicate and forms the base for emeralds
Whitish very soft mineral, so soft it never occurs in distinct crystals
Member of the feldspar mineral family, is flesh pink coloured and displays a simple twin
White-pink bladed crystal with a good cleavage, and is the densest white mineral here
White pearly mineral identifiable by its flaky cleavage
Red/brown mineral that forms in 12 sided crystals, each face rhombus shaped
Hard fragile mineral with a metallic lustre. Produces sparks when hit with a hammer and has a strong odour of garlic. Used as an ore of tin, gold, arsenic and silver
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