Magnesite
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Physical & Optical Properties
Category
Semi-Precious Gems
Mohs Hardness
3.5 – 4.5
Specific Gravity
2.92 – 3.12
Refractive Index
1.509 – 1.72
Crystal System
Trigonal
Luster
Vitreous,Dull
Cleavage
Perfect
Fracture
Conchoidal
Color
various
Birefringence
0.19
Pleochroism
Nil
Mohs Hardness
Mohs Hardness: 3.5 – 4.5
1 Soft10 Hard
Crystal System
Value & Market
Price Tier
Budget (< $50/ct)
Where to Buy Magnesite
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
Dyed to imitate lapis, turquoise (chelsea: common reddish), coral. Acetone test - Blue Chart Gem Identification, Herve Nicolas Lazzarelli, 2010, p 8
3.5 to 4.5Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references
2.92 to 3.12Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references
PerfectUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references
ConchoidalArthur Thomas, Gemstones (2009)
1.509 to 1.720Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references
Uniaxial/-Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references
0.190 to 0.202Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) DoublingMore from other references
NilArthur Thomas, Gemstones (2009)
NilArthur Thomas, Gemstones (2009)
White, yellow, brown, black, colourlessUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references
Translucent,OpaqueUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references
Vitreous,DullWalter Schumann, Gemstones of the world (2001) More from other references
Blue, green, white commonHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Blue green or white fluorescence may be seen with greenish phosphorescenceMichael O?Donoghue, Gems, Sixth Edition (2006)
GreenishHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
TrigonalHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references
MassiveMichael O?Donoghue, Gems, Sixth Edition (2006) More from other references
Magnesite occurs as a primary mineral in igneous or sedimentary rocks or may be formed by the metamorphism or alteration of serpentine and peridotite.Michael O?Donoghue, Gems, Sixth Edition (2006)
Magnesite information at mindat.org
Brazil
Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 426
Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 426
About Magnesite
Magnesite is a magnesium carbonate mineral occurring as white, grayish, yellowish, or rarely colorless masses, crystals, or nodules with a vitreous to dull luster, widespread in metamorphic and sedimentary environments worldwide. It is an important industrial magnesium ore and refractory material, with major deposits in Austria, China, Russia, and Brazil. Gem-quality white magnesite is sometimes dyed bright blue or turquoise and marketed as turquoise imitation, and naturally occurring patterned magnesite with veining is carved into decorative objects.
Jewelry Use
Durability
2/10
Science FYI Family
Frequently Asked Questions
What is Magnesite?
Magnesite is a magnesium carbonate mineral occurring as white, grayish, yellowish, or rarely colorless masses, crystals, or nodules with a vitreous to dull luster, widespread in metamorphic and sedimentary environments worldwide. It is an important industrial magnesium ore and refractory material, w
What is the hardness of Magnesite?
Magnesite has a Mohs hardness of 3.5 to 4.5, making it relatively soft for use in jewelry.
What color is Magnesite?
Magnesite is primarily Various.
How much does Magnesite cost?
Magnesite falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Magnesite?
Magnesite belongs to the Trigonal crystal system.