Yooperlite
Sodalite-syenite
A variety of Syenite
What is Yooperlite?
Yooperlite is a unique and visually stunning variety of sodalite-rich syenite rocks found primarily around the Great Lakes region, particularly in Michigan's Upper Peninsula, hence the name derived from "Yooper" which refers to residents of Michigan's Upper Peninsula. This rock gained popularity and intrigue due to its ability to fluoresce under ultraviolet (UV) light.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Yooperlite 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.
Yooperlite Localities Map
See where Yooperlite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Key Characteristics
Composition of Yooperlite
Alkali Feldspar Group, Sodalite, Hornblende, Biotite
Quick Facts
Physical Properties
- Color
- Gray, orange, black, white, pink, blue-purple, etc.
- Hardness (Mohs)
- 5.5 - 6.5
- Density
- 2.27 - 2.75 g/cm³
- Streak
- White
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Yooperlite FAQs
How do I identify Yooperlite?
Yooperlite can be identified by its hardness of 5.5 - 6.5 on the Mohs scale, Gray color. Look for these key characteristics when examining specimens.
What color is Yooperlite?
Yooperlite typically appears in Gray, orange, black, white, pink, blue-purple, etc.. Color can vary depending on impurities and formation conditions.
How hard is Yooperlite?
Yooperlite has a hardness of 5.5 - 6.5 on the Mohs scale. This gives it moderate hardness.
What is the composition of yooperlite of Yooperlite?
Alkali Feldspar Group, Sodalite, Hornblende, Biotite