Opal's Pals - Minerals
Opal’s Pals Categories
Earthquakes | Gemstones | Glacier | Groundwater and Caves | Igneous Rocks | Inner Structure of the Earth | Mass Wastage | Metamorphic Rocks | Minerals | Our Place in the Universe | Plate Tectonics | Properties of Matter | Sedimentary Rocks | Streams and Rivers | Tectonics | Weathering and Soils | Wind and Deserts
Fluorescent
Fracture
Friability
Gemstones - Cabochons
Hardness - Resistance to Scratching
Hardness - Talc
Magnetic
Mica Book
Phantom Crystal
Silica Tetrahedron
Toughness
Transparency
Conchoidal Fracture
Cryptocrystalline
Crystal Structure
Density
Feldspar
Do you realize that more than $2000 of your new $3000 granite countertop is for the mineral feldspar?