Glass

Q: What is Glass?

O vidro natural e artificial tem sido usado como gema e ornamento durante milénios. O vidro natural inclui a obsidiana (vidro vulcânico), a fulgurite (vidro formado por raios), o vidro líbio (encontrado no deserto do Sahara) e os tectites. O vidro artificial, como o strass e o paste, foi desenvolvid

Q: What is the hardness of Glass?

Glass has a Mohs hardness of 4.0 to 6.0, making it relatively soft for use in jewelry.

Q: How much does Glass cost?

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

Q: What is the crystal system of Glass?

Glass belongs to the Amorphous crystal system.

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Physical & Optical Properties

Category Semi-Precious Gems

Mohs Hardness 4,0 – 6,0

Specific Gravity 2,39 – 4,0

Refractive Index 1,48 – 1,7

Crystal System Amorphous

Luster Vitreous

Fracture Conchoidal

Color various

Mohs Hardness

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

Mohs	Reference mineral	Glass
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 Glass

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

Can be coated with metal foils - Gemmological Tables, Ulrich Henn and Claudio C. Milisenda, 2004, p 2 4 to 6Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references 2.39 to 4.00Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references ConchoidalGemdat.org, Management Team (2012) 1.48 to 1.70Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references IsotropicUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) Various, play of colourUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references Yellowish green, Fe2+ in octahedral coordination. Brown Fe3+ in octahedral coordinationW. William Hanneman, Pragmatic Spectroscopy For Gemologists (2011) Transparent,Translucent,OpaqueUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references VitreousGemdat.org, Management Team (2012) Strong chalky fluorescence commonHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) AmorphousHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references Gas bubbles, swirl marks, partly tabby extinction - Gemmological Tables, Ulrich Henn and Claudio C. Milisenda, 2004, p 2 Glass information at mindat.org

About Glass

O vidro natural e artificial tem sido usado como gema e ornamento durante milénios. O vidro natural inclui a obsidiana (vidro vulcânico), a fulgurite (vidro formado por raios), o vidro líbio (encontrado no deserto do Sahara) e os tectites. O vidro artificial, como o strass e o paste, foi desenvolvido para imitar pedras preciosas. Embora não seja um mineral genuíno, o vidro tem valor histórico, cultural e decorativo significativo. Os tectites, em particular, têm origens cósmicas fascinantes.

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