Brazilianite

saf-ahyuh r

Although this phosphate mineral has a hardness of 5.5, brazilianite is fragile due to its perfect cleavage and brittle nature. Most brazilianite is chartreuse to pale yellow and forms in granitic pegmatites associated with tourmaline and apatite.

Brazilianite Classification
Common Name Brazilianite
Species Brazilianite
Brazilianite Optical Properties
Transparency Transparent - Translucent
Dispersion Strength: Weak Fire Value: 0.014
Refractive Index 1.602-1.621
Tolerance:(+0.003/-0.003)
Birefringence 0.019-0.021
Optic Character Biaxial
Optic Sign Positive
Polariscope Reaction Aggregate (AGG), Doubly Refractive (DR)
Fluorescence SWUV: Inert
LWUV: Inert
Pleochroism Unobservable
Brazilianite Characteristic Physical Properties
Hardness 5.5
Streak White
Specific Gravity 2.940-3.000 Typical:2.970
Toughness Varies
Inclusions Brazilianite stones are rarely eye-clean and typically have natural inclusions.
Luster Vitreous
Fracture Conchoidal
Cleavage Perfect, in one direction
Brazilianite Chemistry & Crystallography
Chemical Name sodium aluminum phosphate hydroxide
Chemical Formula NaAl3(PO4)2(OH)4
Crystal System Monoclinic
Chemistry Classification Phosphate

Brazilianite Colors

  • Colorless Brazilianite Colorless
  • Yellow Brazilianite Yellow
  • Green Brazilianite Green

Countries of Origin

Brazil

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This page was created on June 27, 2014.

This page was last edited on October 24, 2019.