Hornblendite
A variety of Igneous
What is Hornblendite?
Hornblendite is a rare igneous rock containing large amounts of hornblende, which is a combined group of dark-colored amphibole minerals. Hornblendite is often found alongside diorite, granite, gabbro, and peridotite. While uncommon, this rock is used for kitchen countertops, garden walkways and decoration, as well as entryway and flooring purposes.
Uses & Applications
Hornblendite is largely composed of hornblende, which has very few uses in modern society, though garnets are also occasionally present which may be used as gemstones or for other decorative purposes. However, geologists may use this rock for scientific purposes to indicate certain phases of rock metamorphism.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Hornblendite 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.
Hornblendite Localities Map
See where Hornblendite 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
- Black, dark green, greenish black
- Hardness (Mohs)
- 5 - 6
- Density
- 2.85 - 3.07 g/cm³
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Hornblendite FAQs
How do I identify Hornblendite?
Hornblendite can be identified by its hardness of 5 - 6 on the Mohs scale, Black color. Look for these key characteristics when examining specimens.
What color is Hornblendite?
Hornblendite typically appears in Black, dark green, greenish black. Color can vary depending on impurities and formation conditions.
How hard is Hornblendite?
Hornblendite has a hardness of 5 - 6 on the Mohs scale. This gives it moderate hardness.
