Natural Gemstones - Loose Precious & Semi Precious Gemstones

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Physical properties of Emeralds

Physical properties of Emerald loose sale price & Emerald Gemstone Information

Emerald, along with other beryls, is quite hard, having a hardness of 71/2 to 8 on Moh's scale, compared with 10 for diamond, 9 for corundum, and 8 for topaz. Hardness is generally a desirable feature is gemstones.

Chemical Composition and Name	Be3Al2(SiO3)6 - Beryllium Aluminium Silicate
Hardness	7.5 to 8
Refractive Index	1.560 - 1.565 to 1.587 to 1.593
Specific Gravity	2.65 to 2.76
Birefringence	0.005 to 0.009
Crystalline System	Hexagonal
Optic Sign	Negative
Other Optical Properties	Uniaxial

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Swiss Gem Shop loose Gemstone at Sale price and Gemstone Information

Natural Gemstones - Loose Precious & Semi Precious Gemstones

buy high quality natural gemstones fast shipping gem offer at great prices

Emerald, along with other beryls, is quite hard, having a hardness of 71/2 to 8 on Moh's scale, compared with 10 for diamond, 9 for corundum, and 8 for topaz. Hardness is generally a desirable feature is gemstones.

Chemical Composition and Name

Be3Al2(SiO3)6 - Beryllium Aluminium Silicate

Hardness

7.5 to 8

Refractive Index

1.560 - 1.565 to 1.587 to 1.593

Specific Gravity

2.65 to 2.76

Birefringence

0.005 to 0.009

Crystalline System

Hexagonal

Optic Sign

Negative

Other Optical Properties

Uniaxial