Rubellite and Siderite Physical Properties

Rubellite

Siderite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.01-3.063.83-3.89

1 7.18

1.5 Fracture

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

Uneven, Conchoidal, UnevenArthur Thomas, Brittle

1.6 Cleavage

Not Available

Perfect on {01 1 1}

1.7 Mohs Hardness

7-7.53.5-4.5

2 10

1.8 Chemical Composition

Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.

Fe2+ CO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Rubellite and Siderite Chemical Formula

While comparing Rubellite and Siderite 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 Rubellite and Siderite chemical formula.

Chemical formula of Rubellite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
Chemical formula of Siderite- Fe2+ CO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Blue Gemstones

Rubellite Vs Scorzalite

Rubellite Vs Serendibite

Rubellite Vs Shattuckite

Rubellite and Siderite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Rubellite and Siderite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rubellite and Siderite Optical Properties during the identification of gemstone. Specific gravity of Rubellite is 3.83-3.89 whereas that of Siderite is 3.83-3.89.