Balkanite is a very rare copper-silver-mercury sulfide mineral typically found as massive, microscopic aggregates. It is named after the Balkan Mountains in Bulgaria, where it was first discovered in hydrothermal lead-zinc deposits.

Hardness

2.5-3

Mohs

Luster

Metallic

Streak

Black

Transparency

Opaque

mineralrare

Balkanite

Hardness: 2.5-3
Luster: Metallic
Streak: Black
Transparency: Opaque

Is this balkanite?

5-step field check

Run through these checks against the specimen in your hand. The more boxes tick, the more confident the ID.

1
Test the hardness
Try to scratch balkanite with a known reference. Balkanite sits at Mohs 2.5-3, softer than the next harder reference, harder than the previous one.
2
Check the streak
Drag the specimen across an unglazed porcelain plate. Balkanite leaves a black streak.
3
Read the luster
Hold the specimen under a strong light. Balkanite typically shows a metallic luster.
4
Match the color range
Compare against the expected color range: black, gray.
5
Look at form & habit
Crystal system: orthorhombic. Typical habit: massive, granular.

Often confused with

Balkanite vs. its common look-alikes, and how to tell them apart in the field.

Often found alongside balkanite

Minerals reported to co-occur with balkanite. Spotting these in float or country rock is a strong cue you are in the right ground.

All properties

Chemical formula: Cu₉Ag₅HgS₈
Mohs hardness: 2.5-3
Density: 6.08 g/cm³
Colors: Black Gray
Streak: Black
Luster: Metallic
Transparency: Opaque
Crystal system: Orthorhombic
Crystal habit: Massive, Granular
Cleavage: None
Rarity: Rare
Uses: Collector
Host rock: Hydrothermal Polymetallic Deposits
Typical price: $50-300 per specimen

Where rockhounds find balkanite

Classic worldwide localities

Sedmochislenitsi mine, Bulgaria

Field-hunting tip

Look in hydrothermal polymetallic deposits country, the host setting where balkanite typically forms. If you start seeing tennantite, galena, sphalerite in float, you are in the right ground. Field specimens usually show a massive, granular habit, so train your eye for that shape before scanning the outcrop.

Common questions

How do you identify balkanite?+

Mohs hardness is 2.5-3. It typically shows a metallic luster. The streak is black. Common colors include black, gray.

Where is balkanite found?+

Notable localities include Sedmochislenitsi mine, Bulgaria.

How much is balkanite worth?+

Typical asking prices fall in the range of $50-300 per specimen. Quality, size, and provenance can move individual specimens well outside that range.

Is balkanite safe to handle?+

It contains toxic constituents. Contains mercury and copper; wash hands thoroughly after handling and avoid ingestion or inhalation of dust. Handle with care, avoid grinding or breathing dust, and store separately.

What rocks look like balkanite?+

Balkanite is most often confused with Tetrahedrite, Stannite. A quick hardness test and a streak check separate the look-alikes faster than color alone.

What minerals are found with balkanite?+

Balkanite commonly co-occurs with tennantite, galena, sphalerite, pyrite. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does balkanite form in?+

Balkanite typically forms in hydrothermal polymetallic deposits. Working float back to the host body is the standard way to chase a fresh occurrence.

What is balkanite used for?+

Balkanite is used in collector.

Find balkanite on the map

RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.