Brass
What is Brass?
Brass is an alloy of copper and zinc, with the proportions of zinc and other elements varying to produce a range of properties. It is known for its workability, durability, and resistance to corrosion. Brass is often used for decorative purposes due to its gold-like appearance.
Optical Properties
- Refractive Index
- Variable
- Birefringence
- 0
- Pleochroism
- None
- Optical Character
- Isotropic
- Dispersion
- 0
Discover Values
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Brass 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.
Brass Localities Map
See where Brass is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Yellow to gold, sometimes reddish or silvery
- Hardness (Mohs)
- 3-4
- Density
- 8.4-8.7 g/cm³
- Luster
- Metallic
- Crystal System
- Amorphous
Chemical Properties
- Chemical Formula
- Cu-Zn alloy
- Elements
- Cu, Zn
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Brass FAQs
How do I identify Brass?
Brass can be identified by its hardness of 3-4 on the Mohs scale, Yellow to gold color, Metallic luster, Amorphous crystal system. Look for these key characteristics when examining specimens.
What color is Brass?
Brass typically appears in Yellow to gold, sometimes reddish or silvery. Color can vary depending on impurities and formation conditions.
How hard is Brass?
Brass has a hardness of 3-4 on the Mohs scale. This makes it a soft mineral that can be scratched easily.