Aurichalcite
A variety of Minerals
What is Aurichalcite?
Although aurichalcite looks tough, it can easily crumble when tumbled or even mishandled. Its composition of copper and zinc makes it a naturally occurring brass, but it isn't common enough to mine for use as ore. More often, it is used as a sign for more desirable zinc deposits nearby.
Etymology & Origins
It was first described in 1839 by Bottger who named the mineral for its zinc and copper content after the Greek όρειχαλκος, for "mountain brass" or "mountain copper", the name of a fabulous metal.
Uses & Applications
Aurichalcite is composed of zinc and copper, and its presence can be used to indicate where zinc deposits may be found. Although it contains the components of brass, it occurs infrequently and there is no way to extract the brass. It is quite rare, and therefore often enjoyed as a collector’s item.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Aurichalcite 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.
Aurichalcite Localities Map
See where Aurichalcite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Key Characteristics
Formation of Aurichalcite
Aurichalcite typically occurs in the oxidized zone of copper and zinc deposits. Associated minerals include: rosasite, smithsonite, hemimorphite, hydrozincite, malachite and azurite. It was first described in 1839 by Bottger who named the mineral for its zinc and copper content after the Greek όρειχαλκος, for "mountain brass" or "mountain copper", the name of a fabulous metal. The type locality is the Loktevskoye Mine, Upper Loktevka River, Rudnyi Altai, Altaiskii Krai, Western Siberia, Russia.
Health & Safety Information
- ⚠️Aurichalcite dust is toxic because it contains heavy metals Zinc, Copper.
- ⚠️It's advisable to handle aurichalcite carefully to avoid generating dust and wash hands thoroughly afterward. When cutting or polishing aurichalcite, wear a dust mask to prevent inhaling heavy metal particles. Store aurichalcite in a sealed container in a well-ventilated area, away from children and pets. For those involved in crystal healing, never put it in your mouth.
Quick Facts
Physical Properties
- Color
- Pale green, sky blue, greenish blue, colourless to light shades of blue or green in transmitted light
- Hardness (Mohs)
- 1 - 2
- Density
- 3.93 g/cm³
- Streak
- Light blue
- Luster
- Pearly, Silky
- Crystal System
- Monoclinic
Chemical Properties
- Chemical Formula
- (Zn,Cu)5(CO3)2(OH)6
- Elements
- C, Cu, H, O, Zn
Also Known As
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Aurichalcite FAQs
How do I identify Aurichalcite?
Aurichalcite can be identified by its hardness of 1 - 2 on the Mohs scale, Pale green color, Pearly, Silky luster, Monoclinic crystal system. Look for these key characteristics when examining specimens.
What color is Aurichalcite?
Aurichalcite typically appears in Pale green, sky blue, greenish blue, colourless to light shades of blue or green in transmitted light. Color can vary depending on impurities and formation conditions.
How hard is Aurichalcite?
Aurichalcite has a hardness of 1 - 2 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
What is the formation of aurichalcite of Aurichalcite?
Aurichalcite typically occurs in the oxidized zone of copper and zinc deposits. Associated minerals include: rosasite, smithsonite, hemimorphite, hydrozincite, malachite and azurite. It was first described in 1839 by Bottger who named the mineral for its zinc and copper content after the Greek όρειχαλκος, for "mountain brass" or "mountain copper", the name of a fabulous metal. The type locality is the Loktevskoye Mine, Upper Loktevka River, Rudnyi Altai, Altaiskii Krai, Western Siberia, Russia.
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