U3A Geo Crossword 2

Sulphide of iron forming cubic crystals (6)
Mineralogist after whom the hardness scale is named (4)
Tool for testing the colour of a crushed mineral (6, 5)
The way a mineral reflects light from a fresh, unweathered surface (6)
Pyrite and galena display this type of lustre (8)
I show you two for the price of one (7)
The girls can flirt and other queer things can .. (2)
This is truly a 'rainbow nation' mineral (8)
Bornite (copper, iron sulphide) and soap bubbles have this in common (11)
I am heavy, black with a metallic lustre but my streak is earthy red (8)
Pyrite, fluorite, sea salt and galena are all .. (5)
Vein or milky quartz is white due to inclusions of (3)
Test for many carbonate minerals (4)
Iron, titanium oxide forming black streaks on our beaches (8)
The black colour of many Karoo shales is caused by (6)
The green colour of many Karoo shales is due to this type of iron (7)
The maroon colour of many Karoo shales is due to this type of iron (6)
Silicified chrysotile asbestos, an amphibole (6, 3)
Alternating layers of silica and hematite (3)
White alkali feldspar common in Cape Granite (6)
Pink alkali feldspar common in Cape Granite (10)