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 — that is 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.