Backite is a rare lead tellurite mineral discovered in the oxidized zones of tellurium-bearing ore deposits. Collectors typically search for its small, yellow tabular crystals or crusts, usually found alongside other secondary lead and tellurium minerals. It is considered a significant find for advanced mineralogists focusing on rare tellurides.

Hardness

2.5-3

Mohs

Luster

Adamantine

Streak

Yellowish-white

Transparency

Translucent

mineralrare

Backite

Hardness: 2.5-3
Luster: Adamantine
Streak: Yellowish-white
Transparency: Translucent

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Is this backite?

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 backite with a known reference. Backite 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. Backite leaves a yellowish-white streak.
3
Read the luster
Hold the specimen under a strong light. Backite typically shows a adamantine luster.
4
Match the color range
Compare against the expected color range: yellow, yellowish-orange.
5
Look at form & habit
Crystal system: tetragonal. Typical habit: tabular crystals, encrustations.

Often confused with

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

mineral

Wulfenite

Mohs 3

How to tell apart: Streak differs, so Backite leaves yellowish-white, Wulfenite leaves white; luster reads adamantine on Backite and resinous on Wulfenite.

How to tell apart: Streak differs, so Backite leaves yellowish-white, Mimetite leaves white.

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Often found alongside backite

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

All properties

Chemical formula: Pb₂TeO₄
Mohs hardness: 2.5-3
Density: 7.5-7.7 g/cm³
Colors: Yellow Yellowish-orange
Streak: Yellowish-white
Luster: Adamantine
Transparency: Translucent
Crystal system: Tetragonal
Crystal habit: Tabular Crystals, Encrustations
Cleavage: Perfect
Rarity: Rare
Uses: Collector
Host rock: Oxidized Telluride Deposits
Typical price: $100-500+ for micro-specimens

Where rockhounds find backite

Classic worldwide localities

Tombstone, Arizona (USA)

Field-hunting tip

Look in oxidized telluride deposits country, the host setting where backite typically forms. If you start seeing cerussite, emmonsite, tellurite in float, you are in the right ground. Field specimens usually show a tabular crystals, encrustations habit, so train your eye for that shape before scanning the outcrop.

Common questions

How do you identify backite?+

Mohs hardness is 2.5-3. It typically shows a adamantine luster. The streak is yellowish-white. Common colors include yellow, yellowish-orange.

Where is backite found?+

Notable localities include Tombstone, Arizona (USA).

How much is backite worth?+

Typical asking prices fall in the range of $100-500+ for micro-specimens. Quality, size, and provenance can move individual specimens well outside that range.

Is backite safe to handle?+

It contains toxic constituents. Contains lead; handle with care and wash hands thoroughly after contact to avoid ingestion or inhalation of dust. Handle with care, avoid grinding or breathing dust, and store separately.

What rocks look like backite?+

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

What minerals are found with backite?+

Backite commonly co-occurs with Cerussite, Emmonsite, Tellurite, Gold. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does backite form in?+

Backite typically forms in oxidized telluride deposits. Working float back to the host body is the standard way to chase a fresh occurrence.

What is backite used for?+

Backite is used in collector.

Find backite on the map

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