Oolitic Limestone
What is Oolitic Limestone?
Oolitic Limestone is a sedimentary rock composed primarily of calcium carbonate (CaCO3). It is characterized by its granular texture, consisting of small, spherical grains called ooids. These ooids are typically less than 2 mm in diameter and are formed by the concentric precipitation of calcium carbonate around a nucleus, such as a shell fragment or a grain of sand. The rock's appearance can vary depending on the mineral composition and the presence of impurities.
Optical Properties
- Refractive Index
- 1.486 - 1.658
- Birefringence
- 0.000 - 0.000
- Pleochroism
- None
- Optical Character
- Isotropic
- Dispersion
- Low
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Oolitic Limestone 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.
Oolitic Limestone Localities Map
See where Oolitic Limestone is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Typically light-colored, ranging from white, cream, and tan to shades of gray and brown, depending on the impurities present.
- Hardness (Mohs)
- 3-4
- Density
- 2.40 - 2.70 g/cm³
- Streak
- White
Chemical Properties
- Chemical Formula
- CaCO3
- Elements
- Calcium, Carbon, Oxygen, and trace elements like Magnesium, Iron, and Silicon
Also Known As
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Oolitic Limestone FAQs
How do I identify Oolitic Limestone?
Oolitic Limestone can be identified by its hardness of 3-4 on the Mohs scale, Typically light-colored color. Look for these key characteristics when examining specimens.
What color is Oolitic Limestone?
Oolitic Limestone typically appears in Typically light-colored, ranging from white, cream, and tan to shades of gray and brown, depending on the impurities present.. Color can vary depending on impurities and formation conditions.
How hard is Oolitic Limestone?
Oolitic Limestone has a hardness of 3-4 on the Mohs scale. This makes it a soft mineral that can be scratched easily.