Mineral Identification

So far the mineral you are identifying is a light colored non-metallic mineral with a hardness greater than 5 that exihibits fracture.

You now have enough information to begin identifying your mineral. The chart below contains all common rock forming minerals that have the specific properties you have described. To identify you mineral read through the following descriptions and determine which mineral best matches your sample

Hardness
Description
Name
Additional Data
6
  • Orange, brown, white, gray, green or pink.
  • Cleavge in 2 planes at nearly right angles.
  • Exsolution lamellae
Potassium Feldspar
 
7
  • white
  • Greasy luster
  • massive or hexagonal prisms
  • transparent-translucent
Milky Quartz
7
  • Gray-brown
  • Greasy luster
  • massive or hexagonal prisms
  • transparent-translucent
Smoky Quartz
7
  • Yellow
  • Greasy luster
  • massive or hexagonal prisms
  • transparent-translucent
Citrine
7
  • pink
  • Greasy luster
  • massive or hexagonal prisms
  • transparent-translucent
Rose Quartz
7
  • Colorless
  • Greasy luster
  • massive or hexagonal prisms
  • transparent-translucent
Quartz
7
  • Opaque gray or white
  • waxy luster
  • Conchoidal fracture
Chert
7
  • Pale olive green.
  • Conchoidal fracture.
  • Transparent or translucent.
Olivine
 
7
  • Colorless, white, yellow, light brown.
  • Translucent opaque.
  • Laminated or massive.
  • Cryptocrystalline.
Chalcedony
9
  • Opaque red, gray or white
  • hexagonal prisms with striated flat ends
Corrundum
 

 

©2006 Sean Tvelia