Red marble is a recrystallized limestone containing iron oxide impurities that provide its distinct vibrant color. It is highly valued in lapidary work for its ability to take a high polish and its intricate, swirling patterns.
Is this red marble?
5-step field checkRun through these checks against the specimen in your hand. The more boxes tick, the more confident the ID.
- 1Test the hardnessTry to scratch red marble with a known reference. Red Marble sits at Mohs 3-4 — softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Red Marble leaves a white streak.
- 3Read the lusterHold the specimen under a strong light. Red Marble typically shows a vitreous luster.
- 4Match the color rangeCompare against the expected color range: red, white, pink.
- 5Look at form & habitTypical habit: massive.
Often confused with
Red Marble vs. its common look-alikes — and how to tell them apart in the field.
How to tell apart: Red Jasper is the harder of the two (Mohs 6.5-7 vs. 3-4).
How to tell apart: Streak differs — Red Marble leaves white, Cinnabar leaves scarlet; luster reads vitreous on Red Marble and adamantine on Cinnabar.
Often found alongside red marble
Minerals reported to co-occur with red marble. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Mohs hardness
- 3-4
- Density
- 2.7-2.8 g/cm³
- Streak
- White
- Luster
- Vitreous
- Transparency
- Opaque
- Crystal habit
- Massive
- Cleavage
- Perfect Rhombohedral
- Rarity
- Common
- Uses
- Decorative, Lapidary, Construction
- Host rock
- Metamorphic Terrain
- Typical price
- $5-50 for slabs or polished specimens
Where rockhounds find red marble
1 mapped spotsClassic worldwide localities
- Italy
- Greece
- Turkey
- USA
Field-hunting tip
Look in metamorphic terrain country — that is the host setting where red marble typically forms. If you start seeing calcite, dolomite, quartz in float, you are in the right ground. Field specimens usually show a massive habit, so train your eye for that shape before scanning the outcrop. In the U.S., the densest reported localities are in Vermont — start trip planning there.
Common questions
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Find red marble on the map
RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.
