Brazilianite
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Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
5,5
Specific Gravity
2,98 – 2,99
Refractive Index
1,602 – 1,625
Crystal System
Monoclinic
Luster
Vitreous
Cleavage
Good
Fracture
Conchoidal
Color
various
Birefringence
0,018
Dispersion
0,014
Pleochroism
Very weak
Mohs Hardness
Mohs Hardness: 5,5
1 Soft10 Hard
Crystal System
Value & Market
Price Tier
Budget (< $50/ct)
Where to Buy Brazilianite
Blue Nile
Fine jewelry retailer
James Allen
Gemstone jewelry
Brilliant Earth
Ethically sourced gems
Amazon
Wide selection
Links may earn a commission at no extra cost to you.
Treatments
This material has been reported to fade (Sinkankas, 1972) and to lose its greenish color completely on being heated above 140�C; irradiation did not reverse this change (Requardt et al, 1982) - Nassau (1984)
5.5Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references
2.98 to 2.99Walter Schumann, Gemstones of the world (2001) More from other references
BrittleHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references
GoodWalter Schumann, Gemstones of the world (2001) More from other references
ConchoidalMichael O?Donoghue, Gems, Sixth Edition (2006) More from other references
1.602 to 1.625Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references
Biaxial/+Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references
0.018 to 0.021Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references
Very weakWalter Schumann, Gemstones of the world (2001) More from other references
0.014Michael O?Donoghue, Gems, Sixth Edition (2006) More from other references
Green, yellowish-greenUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references
TransparentUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references
VitreousArthur Thomas, Gemstones (2009)
NoneWalter Schumann, Gemstones of the world (2001) More from other references
MonoclinicHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references
Characteristically equant or spear-head shaped crystalsMichael O?Donoghue, Gems, Sixth Edition (2006) More from other references
It occurs in phosphate-rich zones of granite pegmatites.Michael O?Donoghue, Gems, Sixth Edition (2006)
Brazilianite information at mindat.org
Brazil
Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 392
Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 392
USA
Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 392
About Brazilianite
Brazilianite is a vivid chartreuse to yellow-green sodium aluminum phosphate mineral discovered in 1944 in Minas Gerais, Brazil—the only significant source in the world—and named in honor of its country of origin. Its distinctive neon yellow-green color and glassy transparency make faceted brazilianite among the most instantly recognizable collector gems. Although large crystals occur, perfect cleavage requires skilled cutting to produce finished gems.
Jewelry Use
Durability
4/10
Science FYI Family
Frequently Asked Questions
What is Brazilianite?
Brazilianite is a vivid chartreuse to yellow-green sodium aluminum phosphate mineral discovered in 1944 in Minas Gerais, Brazil—the only significant source in the world—and named in honor of its country of origin. Its distinctive neon yellow-green color and glassy transparency make faceted brazilian
What is the hardness of Brazilianite?
Brazilianite has a Mohs hardness of 5.5, making it moderate for use in jewelry.
What color is Brazilianite?
Brazilianite is primarily Various.
How much does Brazilianite cost?
Brazilianite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Brazilianite?
Brazilianite belongs to the Monoclinic crystal system.