Schorl and Rock Crystal Physical Properties

Schorl

Rock Crystal

Add ⊕

1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.18-3.222.65

1 7.18

1.5 Fracture

Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal

ConchoidalWalter Schumann, Gemstones of the world (2001), ConchoidalWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

{1011} Indistinct

Not Available

1.7 Mohs Hardness

Not Available7

2 10

1.8 Chemical Composition

Na(Fe2+3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

SiO 2Walter Schumann , Gemstones of the world (2001)

Schorl and Rock Crystal Chemical Formula

While comparing Schorl and Rock Crystal physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Schorl and Rock Crystal chemical formula.

Chemical formula of Schorl- Na(Fe2+3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Chemical formula of Rock Crystal- SiO 2Walter Schumann , Gemstones of the world (2001)

Compare Black Gemstones

Schorl Vs Triplite

Schorl Vs Snowflake Obsidian

Schorl Vs Xenotime

Schorl and Rock Crystal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Schorl and Rock Crystal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Schorl and Rock Crystal Optical Properties during the identification of gemstone. Specific gravity of Schorl is 2.65 whereas that of Rock Crystal is 2.65.