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Mineralogy Version 2

Across
Biomineral in bones
Cr-bearing mineral
Ca-plagioclase
Type of photoluminescence
Na-plagioclase
HCl
"false-coloured" mineral
Be-bearing mineral
Oldest mineral
Softest mineral
Ni-bearing sulphide
High-T silica polymorph
Star Trek mineral
Common Cu-sulphide
Down
Transparent gypsum
Strong bond
Hardest mineral
Hardness scale
Fluorite cleavage
CN = 12
Mo-bearing mineral
Pyrite polymorph
Number of nearest neighbours
X-ray law
Fool's gold
Plagioclase twins
Rock salt
Ductile bond
Hard oxide
Hydrogen isotope
Purple quartz