Olive green fluorapatite on white albite from Brazil with mirror reflection.
Olive green fluorapatite crystal cluster on white albite matrix from Brazil.
Macro of olive green hexagonal fluorapatite crystal faces, Brazil.

Fluorapatite on Albite

Fluorapatite – Ca5(PO4)3F
Elements: Calcium, Phosphorus, Oxygen, Fluorine
Class: Phosphates
Crystal System: Monoclinic
Hardness: 5
Apatite
Talc (1)Diamond (10)
About as hard as a steel knife blade.
Albite – Na(AlSi3O8)
Elements: Sodium, Aluminum, Silicon, Oxygen
Class: Silicates – Tectosilicates
Crystal System: Triclinic
Hardness: 6-6.5
Orthoclase
Talc (1)Diamond (10)
Scratches glass. Harder than a steel knife.
Origin: Sapo Mine, Ferruginha, Conselheiro Pena, Doce Valley – Brazil
Did you know?

The mineral that hardens your tooth enamel is also a piece of a lunar puzzle. Most of the apatite in Apollo Moon rocks is fluorapatite, and the hydrogen hidden in it once pushed estimates of the Moon's water too high.

Albite is named from the Latin for white, yet it hides a trick of light. Fine layers of albite woven through orthoclase scatter light into the floating blue sheen of moonstone, an effect called adularescence.

You might also like

Yellow gemmy apatite crystals on dark matrix from Mexico with reflection.
Apatite (Fluorapatite)
Green botryoidal wavellite specimen showing radial yellow green interior structures.
Wavellite
Close macro view of glittering dark green libethenite micro crystals.
Libethenite
Blue and green botryoidal cornetite mineral crust from Congo.
Cornetite
Chalcopyrite, Calcite & DolomiteFluorite