Omarolluk
A variety of Sedimentary
What is Omarolluk?
Omarolluk is a type of glacial erratic composed of dark siliceous greywacke with hemispherical voids. The hemispherical voids arise from the selective dissolution of carbonate concretions within the greywacke. Originating from the Proterozoic Omarolluk Formation in the Belcher Islands of Hudson Bay, Canada, Omarolluks were transported by glaciers across central Canada and into the United States, making them valuable in understanding glacier movement.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Omarolluk 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.
Omarolluk Localities Map
See where Omarolluk is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Dark grey, black, brown, etc.
- Hardness (Mohs)
- 6 - 7
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Omarolluk FAQs
How do I identify Omarolluk?
Omarolluk can be identified by its hardness of 6 - 7 on the Mohs scale, Dark grey color. Look for these key characteristics when examining specimens.
What color is Omarolluk?
Omarolluk typically appears in Dark grey, black, brown, etc.. Color can vary depending on impurities and formation conditions.
How hard is Omarolluk?
Omarolluk has a hardness of 6 - 7 on the Mohs scale. This gives it moderate hardness.
