Petrified Wood (Fossilized Wood)

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Physical & Optical Properties

Mohs Hardness 6,5 – 7,0
Specific Gravity 2,58 – 2,91
Crystal System Trigonal
Cleavage None
Fracture Uneven,Splintery
Color various
Pleochroism Absent

Mohs Hardness

Mohs Hardness: 6,5 – 7,0
1 Soft10 Hard

Crystal System

a a a Trigonal (Rhombohedral) a = b = c, α = β = γ ≠ 90°

Value & Market

Price Tier Moderate ($50-500/ct)

Where to Buy Petrified Wood (Fossilized Wood)

About Petrified Wood (Fossilized Wood)

Petrified wood is fossilized plant material in which the original organic wood has been replaced molecule by molecule with silica (quartz, chalcedony, or opal), iron oxides, and other minerals over millions of years, preserving the original cellular structure while rendering the material stone-hard. Colors range from creamy white and tan to vivid red, orange, yellow, blue, and black depending on the minerals involved in replacement. Famous localities include the Petrified Forest National Park in Arizona (USA), Chemnitz in Germany, and the Chinle Formation across the American Southwest.

Jewelry Use

Durability 6/10

Science FYI Family

Frequently Asked Questions

What is Petrified Wood (Fossilized Wood)?
Petrified wood is fossilized plant material in which the original organic wood has been replaced molecule by molecule with silica (quartz, chalcedony, or opal), iron oxides, and other minerals over millions of years, preserving the original cellular structure while rendering the material stone-hard.
What is the hardness of Petrified Wood (Fossilized Wood)?
Petrified Wood (Fossilized Wood) has a Mohs hardness of 6.5 to 7.0, making it moderate for use in jewelry.
What color is Petrified Wood (Fossilized Wood)?
Petrified Wood (Fossilized Wood) is primarily Various.
How much does Petrified Wood (Fossilized Wood) cost?
Petrified Wood (Fossilized Wood) falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Petrified Wood (Fossilized Wood)?
Petrified Wood (Fossilized Wood) belongs to the Trigonal crystal system.

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