Magnesio-hornblende
A variety of Minerals
What is Magnesio-hornblende?
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Magnesio-hornblende 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.
Quick Facts
Physical Properties
- Color
- Medium green to dark green to green-black to black, brown
- Hardness (Mohs)
- 5 - 6
- Rock tumbling
- With care
- Streak
- Pale grey-green, grey-white
Chemical Properties
- Chemical Formula
- ☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2 Defined as a an amphibole in the magnesiohornblende group of the Calcium subgroup with Mg>Fe2+ and Al>Fe3+ in the C position and with (OH) as the dominant anion in the W position.
- Elements
- Al, Ca, H, Mg, O, Si
Also Known As
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Magnesio-hornblende FAQs
How do I identify Magnesio-hornblende?
Magnesio-hornblende can be identified by its hardness of 5 - 6 on the Mohs scale, Medium green to dark green to green-black to black color. Look for these key characteristics when examining specimens.
What color is Magnesio-hornblende?
Magnesio-hornblende typically appears in Medium green to dark green to green-black to black, brown. Color can vary depending on impurities and formation conditions.
How hard is Magnesio-hornblende?
Magnesio-hornblende has a hardness of 5 - 6 on the Mohs scale. This gives it moderate hardness.
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