Christelite is a very rare copper-zinc sulfate mineral that typically forms as small, clear, tabular crystals. It is primarily found in the oxidized zones of copper deposits, particularly in the San Francisco mine in Chile. Due to its rarity and delicate nature, it is highly sought after by advanced systematic mineral collectors.

Hardness

2.5

Mohs

Luster

Vitreous

Streak

White

Transparency

Transparent

mineralrare

Christelite

Hardness: 2.5
Luster: Vitreous
Streak: White
Transparency: Transparent

Is this christelite?

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 christelite with a known reference. Christelite sits at Mohs 2.5 — softer than the next harder reference, harder than the previous one.
2
Check the streak
Drag the specimen across an unglazed porcelain plate. Christelite leaves a white streak.
3
Read the luster
Hold the specimen under a strong light. Christelite typically shows a vitreous luster.
4
Match the color range
Compare against the expected color range: colorless, white.
5
Look at form & habit
Crystal system: monoclinic. Typical habit: tabular crystals.

Often confused with

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

mineral

Serpierite

Mohs 2

How to tell apart: Luster reads vitreous on Christelite and pearly on Serpierite.

How to tell apart: Streak differs — Christelite leaves white, Ktenasite leaves pale blue.

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Often found alongside christelite

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

All properties

Chemical formula: Zn₃Cu₂(SO₄)₂(OH)₆·4H₂O
Mohs hardness: 2.5
Density: 4.46 g/cm³
Colors: Colorless White
Streak: White
Luster: Vitreous
Transparency: Transparent
Crystal system: Monoclinic
Crystal habit: Tabular Crystals
Cleavage: Perfect
Rarity: Rare
Uses: Collector
Host rock: Oxidized Hydrothermal Ore Deposits
Typical price: $50-300 per specimen

Where rockhounds find christelite

Classic worldwide localities

San Francisco Mine, Chile

Field-hunting tip

Look in oxidized hydrothermal ore deposits country — that is the host setting where christelite typically forms. If you start seeing ktenasite, serpierite, gypsum in float, you are in the right ground. Field specimens usually show a tabular crystals habit, so train your eye for that shape before scanning the outcrop.

Common questions

How do you identify christelite?+

Mohs hardness is 2.5. It typically shows a vitreous luster. The streak is white. Common colors include colorless, white.

Where is christelite found?+

Notable localities include San Francisco Mine, Chile.

How much is christelite 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 christelite safe to handle?+

It contains toxic constituents. Contains copper and zinc. Avoid inhaling dust or ingestion; wash hands thoroughly after handling specimens. Handle with care, avoid grinding or breathing dust, and store separately.

What rocks look like christelite?+

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

What minerals are found with christelite?+

Christelite commonly co-occurs with Ktenasite, Serpierite, Gypsum. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does christelite form in?+

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

What is christelite used for?+

Christelite is used in collector.

Find christelite on the map

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