Trilobite
What is Trilobite?
Trilobites are extinct marine arthropods that lived over 520 million years ago. They are characterized by their three-lobed body plan, which gives them their name. Trilobites are among the most diverse groups of extinct animals, with over 20,000 species described. They are found worldwide, and their fossils are often well-preserved, making them popular among collectors.
Optical Properties
- Refractive Index
- Variable
- Birefringence
- 0.000
- Pleochroism
- None
- Optical Character
- Isotropic
- Dispersion
- 0.000
Discover Values
This stone excels in cultural value.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Trilobite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Trilobite Localities Map
See where Trilobite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
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Quick Facts
Physical Properties
- Color
- Various, depending on the mineral composition of the fossil (e.g., brown, gray, black)
- Hardness (Mohs)
- 5-7
- Density
- Variable
- Luster
- Earthy
- Crystal System
- Amorphous
Chemical Properties
- Chemical Formula
- Variable, depends on the mineral composition of the fossil (e.g., calcium carbonate, silica)
- Elements
- Variable, depends on the mineral composition of the fossil (e.g., Ca, C, O, Si)
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Trilobite FAQs
How do I identify Trilobite?
Trilobite can be identified by its hardness of 5-7 on the Mohs scale, Various color, Earthy luster, Amorphous crystal system. Look for these key characteristics when examining specimens.
What color is Trilobite?
Trilobite typically appears in Various, depending on the mineral composition of the fossil (e.g., brown, gray, black). Color can vary depending on impurities and formation conditions.
How hard is Trilobite?
Trilobite has a hardness of 5-7 on the Mohs scale. This gives it moderate hardness.