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Gem and Mineral Library - Index

-By Family-            -By Properties-


Top Quality Facet Rough!
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Click on a Mineral Family or a Specific Mineral Variety Above for More Information.

Picture of Mineral Rough on Detail PagePicture of Faceted Gem on Detail Page
Mineral FamilyActinolite
Hardness5-6
Refractive Index1.614-1.641
Specific Gravity2.95-3.1
Varieties

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or variety for details.

None
Mineral FamilyAmber
Hardness2-2.5
Refractive Index1.539-1.545
Specific Gravity1.0-1.02
Varieties

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or variety for details.

None
Mineral FamilyAmblygonite
Hardness5.5-6
Refractive Index1.612-1.636
Specific Gravity2.98-3.06
Varieties

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or variety for details.

None
Mineral FamilyAmmonite
Hardnessvaries
Refractive Index1.52-1.68
Specific Gravity2.7
Varieties

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or variety for details.

None
Mineral FamilyBeryl
Hardness7.5-8
Refractive Index1.56/1.57 to 1.59/1.6
Specific Gravity2.65-2.9
Varieties

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or variety for details.

Aquamarine    
Emerald  
Heliodor  
Morganite
Red Beryl  
Mineral FamilyCorundum
Hardness9
Refractive Index1.77/1.76
Specific Gravity3.9-4.1
Varieties

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or variety for details.

Padparadscha
Ruby  
Sapphire  
Mineral FamilyDiamond    
Hardness10
Refractive Index2.41
Specific Gravity3.52
Varieties

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or variety for details.

None
Mineral FamilyGarnet    
Hardness6.5-7.5
Refractive Index1.73-1.83
Specific Gravity3.6-4.32
Varieties

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or variety for details.

Almandine
Grossular
Hessonite (Grossular)
Pyrope
Rhodolite    
Spessartine
Spessartite    
Mineral FamilyTopaz
Hardness8
Refractive Index1.64/1.63 to 1.62/1.61
Specific Gravity3.52-3.56
Varieties

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or variety for details.

Blue Topaz
Golden Topaz
Green Topaz
Imperial Topaz  
Sherry Topaz
Click on a Mineral Family or a Specific Mineral Variety Above for More Information.
Facet Rough
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Gem Facts
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As for God, his way is perfect; the word of the LORD is tried: he is a buckler to all them that trust in him. - 2 Samuel 22:31 - Click for More
Recent Hand SelectSelect by Mineral FamilySelect by Carat WeightSelect by PriceSelect by ColorFacet Rough Parcels
Rough Clarity ChartSynthetic RoughFacet Rough Overview 
Ultra-Tec Facet MachineFaceting LapsDiamond PowdersFacet Wax & Misc.Cabochon MachinesFaceting Books & Videos
Gem Identification ToolsGem FiltersGemOro MicroscopesGem ScalesGem LoupesGem Tweezers
Gem CalipersGem LightsGem & Mineral Books 
Select by Mineral FamilySelect by Carat WeightSelect by PriceSelect by ColorSelect All 
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