How do I identify Agatized Coral?

Agatized Coral can be identified by its hardness of 6.5 - 7 on the Mohs scale, White to cream color. Look for these key characteristics when examining specimens.

What color is Agatized Coral?

Agatized Coral typically appears in White to cream, red, gray, orange, yellow, brown, black, blue, etc.. Color can vary depending on impurities and formation conditions.

How hard is Agatized Coral?

Agatized Coral has a hardness of 6.5 - 7 on the Mohs scale. This gives it moderate hardness.

Agatized Coral

A variety of Coral

Uncommon

What is Agatized Coral?

Fossilized corals are often collectively called agatized Coral although some are actually calcite textured. The cross-section pattern of the fossilized corals when polished is attractive to the collecters. Agatized Coral is the state symbol of Michigan (know as "petoskey stone") and Florida in the USA.

Optical Properties

Refractive Index: 1.486-1.658
Birefringence: 0.160-0.172
Pleochroism: None
Optical Character: Uniaxial negative

Discover Values

Rarity

4.2out of 5.0

84%

Popularity

4.2out of 5.0

84%

Beauty

4.5out of 5.0

90%

Excellent

Cultural Value

4.5out of 5.0

90%

Excellent

Collection Value

4.5out of 5.0

90%

Excellent

Perfect for educational purposes and cultural appreciation

This stone excels in beauty, cultural value, collection value.

Agatized Coral Market Value Calculator

Estimate the market value of Agatized Coral using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.