Apophyllite Group

Q: What is Apophyllite Group?

鱼眼石族矿物以其完美的板状晶体和如鱼鳞般闪烁的珍珠光泽而著称，这种独特的光泽正是其名称的由来。这族矿物通常产于玄武岩气孔中，与沸石类矿物共生，形成令人叹为观止的晶洞。印度德干高原的浦那地区出产的绿色鱼眼石晶体尤为精美，是全球矿物收藏界的珍品。

Q: What is the hardness of Apophyllite Group?

Apophyllite Group has a Mohs hardness of 4.5 to 5.0, making it relatively soft for use in jewelry.

Q: What color is Apophyllite Group?

Apophyllite Group is primarily Various.

Q: How much does Apophyllite Group cost?

Apophyllite Group falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.

Q: What is the crystal system of Apophyllite Group?

Apophyllite Group belongs to the Tetragonal crystal system.

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Physical & Optical Properties

Category Semi-Precious Gems

Mohs Hardness 4.5 – 5.0

Specific Gravity 2.3 – 2.5

Refractive Index 1.53 – 1.543

Crystal System Tetragonal

Luster Pearly

Fracture Uneven

Color various

Mohs Hardness

Mohs hardness of Apophyllite Group shown against the ten reference minerals, from talc (1) to diamond (10).

Mohs	Reference mineral	Apophyllite Group
1	Talc
2	Gypsum
3	Calcite
4	Fluorite
5	Apatite	●
6	Orthoclase
7	Quartz
8	Topaz
9	Corundum
10	Diamond

Crystal System

Value & Market

Price Tier Budget (< $50/ct)

Where to Buy Apophyllite Group

Blue Nile Fine jewelry retailer

James Allen Gemstone jewelry

Brilliant Earth Ethically sourced gems

Amazon Wide selection

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Treatments

Colorless material has been reported by Plough (1957) to turn green on irradiation. Heat could be expected to reverse this change - Nassau, 1984 4.5 to 5Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references 2.30 to 2.50Walter Schumann, Gemstones of the world (2001) More from other references PerfectHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) Easy and perfectMore from other references UnevenArthur Thomas, Gemstones (2009) 1.530 to 1.543Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references Uniaxial/+,-Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references 0.000 to 0.003Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references HighArthur Thomas, Gemstones (2009) White, colourless, bluish, reddish, yellowish, greenishUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references Green, V4+ in distorted octahedral coordinationW. William Hanneman, Pragmatic Spectroscopy For Gemologists (2011) Transparent,Translucent,OpaqueUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references PearlyHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references Blue-green and yellowArthur Thomas, Gemstones (2009) TetragonalHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references Tabular, prismatic, pseudo-cubicArthur Thomas, Gemstones (2009) Apophyllite occurs in basalts and granitesMichael O?Donoghue, Gems, Sixth Edition (2006) Apophyllite Group information at mindat.org