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Red Calcite
Red Calcite is carbonate, CaCO₃ + Fe oxides. In the hand, it rates 3 on the Mohs scale, and it runs brick red and red-orange. Brick-red stone with calcite's waxy glow and softness, hematite-stained carbonate that fizzes in vinegar where every red jasper stays silent. Iron-rich carbonate veins; commercial material from Mexico.
The geology.
Red Calcite carries the formula CaCO₃ + Fe oxides. It belongs to the trigonal system. It is classified as carbonate.
It sits at 3 on the Mohs scale. The surface reads waxy to vitreous. Light behaviour is translucent to opaque. Specific gravity runs 2.71. The streak is white. It breaks with perfect rhombohedral cleavage.
Brick-red stone with calcite's waxy glow and softness, hematite-stained carbonate that fizzes in vinegar where every red jasper stays silent.
You will most often meet it as raw chunks, tumbled, palm stones or eggs.
The origins.
Iron-rich carbonate veins; commercial material from Mexico.
On value, the database notes: common and affordable.
Traditional associations.
In energy work traditions, associated with gentle vitality and willingness to act.
People buy on this language, so it belongs on the page. It belongs under the facts, though, not over them.
Spotting the real thing.
Brick-red stone with calcite's waxy glow and softness, hematite-stained carbonate that fizzes in vinegar where every red jasper stays silent.
| Looks like | How to tell them apart |
|---|---|
| Red jasper | Jasper scratches glass and never fizzes; red calcite does the opposite |
| Red aragonite | Sibling carbonate, aragonite shows fibrous banding rather than blocky cleavage |
| Carnelian | Glass-hard, translucent ember glow, no fizz |
At-home tests.
You can run every one of these at a kitchen table. Good light matters more than gear when you are looking at red calcite.
| Test | What you should see |
|---|---|
| Acid check | Fizzes with vinegar |
| Scratch check | Knife scratches it easily (Mohs 3) |
| By eye | Cleavage sparkle inside |
If these checks leave you unsure, that is what appraisers are for. Do not file, heat or soak a piece to find out.
Care & handling.
At 3 on the Mohs scale this is a soft material. Keep it as a display piece, store it apart from harder stones, and skip daily-wear settings.
It breaks with perfect rhombohedral cleavage, which is worth knowing before you set it or drop it.
Most damage happens during cleaning, not wearing. Avoid steamers, ultrasonic tanks and anything from under the sink.
A deeper look.
Extended detail on composition, sourcing, authentication and market value.
The physical record
The formula on record is CaCO₃ + Fe oxides. Crystal system: Trigonal. Specific gravity: 2.71. Streak: White. Cleavage and fracture: Perfect rhombohedral cleavage.
How it reaches the market
Iron-rich carbonate veins; commercial material from Mexico.
What it gets confused with
Red jasper: Jasper scratches glass and never fizzes; red calcite does the opposite. Red aragonite: Sibling carbonate, aragonite shows fibrous banding rather than blocky cleavage. Carnelian: Glass-hard, translucent ember glow, no fizz.
What it is worth
Common and affordable.
One more thing
The red is a whisper-thin hematite dust caught between growing calcite layers, rust liftd to gemcraft.
An education-first guide.
There is nothing to buy on this page. Red Calcite is not part of our catalogue, and the guide is here anyway because somebody searching the name deserves a straight answer.
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