Sanidine

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Physical & Optical Properties

Category Semi-Precious Gems

Mohs Hardness 6.0

Specific Gravity 2.54 – 2.61

Refractive Index 1.518 – 1.536

Crystal System Monoclinic

Luster Vitreous

Cleavage Good

Fracture Uneven,Conchoidal

Color various

Birefringence 0.005

Pleochroism Weak

Mohs Hardness

Mohs Hardness: 6.0

1 Soft10 Hard

Crystal System

Value & Market

Price Tier Moderate ($50-500/ct)

Where to Buy Sanidine

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

Some sanidine subjected to iridation turns amber or smoky coloured. 6Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references 2.54 to 2.61Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references BrittleMichael O?Donoghue, Gems, Sixth Edition (2006) GoodMichael O?Donoghue, Gems, Sixth Edition (2006) Excellent to good Uneven,ConchoidalMichael O?Donoghue, Gems, Sixth Edition (2006) 1.518 to 1.536Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references Biaxial/-Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references 0.005 to 0.008Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references WeakMichael O?Donoghue, Gems, Sixth Edition (2006) WeakMichael O?Donoghue, Gems, Sixth Edition (2006) Light gray to light brownish varietyHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references Transparent,TranslucentMichael O?Donoghue, Gems, Sixth Edition (2006) VitreousMichael O?Donoghue, Gems, Sixth Edition (2006) Weak reddish orange under both LWUV and SWUV (Madagascar)Michael O?Donoghue, Gems, Sixth Edition (2006) MonoclinicHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references A flattened crystalMichael O?Donoghue, Gems, Sixth Edition (2006) Sanidine is a common constituent in acid and intermediate volcanic rocks such as rhyolites, dacites and trachytes; where the rock cooled quickly at above approximately 900�C, sanidine is the stable structureMichael O?Donoghue, Gems, Sixth Edition (2006) Sanidine information at mindat.org Madagascar  Myanmar  Ted Themelis (2008) Gems & mines of Mogok Ted Themelis (2008) Gems & mines of Mogok Ted Themelis (2008) Gems & mines of Mogok Sri Lanka 

About Sanidine

새니딘은 고온에서 형성되는 칼륨 장석으로 무색에서 옅은 노란색, 또는 회색 결정을 이루며, 화산암, 특히 조면암과 유문암에서 발견됩니다. 내포물이 없는 투명한 새니딘은 드물게 패싯 보석으로 가공되며, 아들라리아 변종은 때때로 달빛 광택(유백광)을 보이기도 합니다. 독일 에이펠 지역이 유명한 산지이며, 주로 수집가들이 관심을 갖는 광물입니다.