Mineral Specimens. Magnatite Strongly Magnetic Form of Iron Ore

Mineral Specimens

Magnatite•Strongly Magnetic

•Form of Iron Ore

•Hardness 1- 2

Pyrite•Brass Yellow

•Cubic• “Fool’s Gold”

•Form of Iron Ore

Chalcopyrite•Yellow Brass Purple “Peacock Ore”

•Form of Iron Ore

Galena• Gray

•S.G. = 7.5 •Cubic •Form of LEAD Ore

Limonite• Yellow-brown to rust• Hardness

= 5.5

• Form of Iron Ore

hematite•Red to Brown Streak

•Form of Iron Ore•Shiny when polished

Orthoclase•Cleavage Planes at 90

ORTHOCLASE (cont)

Quartz•HEXAGONAL 6 Crystals

•Shell-like Fracture

Citrine

Amethyst

Rose Smoky

Olivine• Shades of Green

•Peridot birthstone

Halite•Colorless to White•Salty Taste

Calcite•Hardness = 3• “Scale” in water•Triclinic

Calcite may DOUBLE REFRACT

Gypsum•Hardness = 2

Talc

•Hardness = 1 •Greasy luster

Muscovite•Cleavage in flat sheets

Fluorite•8 sided cleavage•

Fluorite samples

Augite•2 Cleavage planes

@ 90 •Black

Corundum•HEXAGONAL 6 crystals

•Hardness = 9 •Red = RUBY•Other = Sapphire

Garnet•Reddish Brown•Brittle

•Shell-like Fracture

Petrified Wood

•Black

•Cleavage in flat sheets

•Shell-like Fracture

minerals

NATURAL LIGHT

UV Light