Onyx and Phosphosiderite Physical Properties

Onyx

Phosphosiderite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.55-2.702.74-2.76

1 7.18

1.5 Fracture

Not Available

UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001), Uneven

1.6 Cleavage

Indiscernible

{010} Perfect, {001} Distinct

1.7 Mohs Hardness

6.5-73.5-4

2 10

1.8 Chemical Composition

SiO₂

Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)

Onyx and Phosphosiderite Chemical Formula

While comparing Onyx and Phosphosiderite 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 Onyx and Phosphosiderite chemical formula.

Chemical formula of Onyx- SiO₂
Chemical formula of Phosphosiderite- Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)

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Onyx and Phosphosiderite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Phosphosiderite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Phosphosiderite Optical Properties during the identification of gemstone. Specific gravity of Onyx is 2.74-2.76 whereas that of Phosphosiderite is 2.74-2.76.