Green marble is a metamorphic rock composed primarily of recrystallized carbonate minerals, characterized by its deep green veining caused by the presence of serpentine minerals. It is widely used in architecture and lapidary arts for its striking contrast between dark green base colors and lighter white or gray swirls.
Is this green 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 green marble with a known reference. Green Marble sits at Mohs 3-5, softer than the next harder reference, harder than the previous one.
- 2Read the textureLook at a fresh break with a hand lens. Texture: Crystalline; typically not foliated.
- 3Pick out the mineralsComposition: Recrystallized calcite or dolomite; magnesium-rich varieties may be green from serpentine. Identify the two or three most abundant grains.
- 4Read the lusterHold the specimen under a strong light. Luster: subvitreous.
- 5Match the color rangeCompare against the expected color range: green, dark green, white, black.
Often confused with
Green Marble vs. its common look-alikes, and how to tell them apart in the field.
How to tell apart: Luster reads subvitreous on Green Marble and adamantine to vitreous; silky if fibrous; dull to earthy if massive on Malachite.
How to tell apart: Luster reads subvitreous on Green Marble and waxy on Serpentinite.
Often found alongside green marble
Minerals reported to co-occur with green marble. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Mohs hardness
- 3-5
- Density
- 2.6-2.9 g/cm³
- Luster
- Subvitreous
- Transparency
- Opaque
- Rarity
- Common
- Uses
- Decorative, Lapidary, Construction
- Host rock
- metamorphic belts
- Texture
- Crystalline; typically not foliated
- Composition
- Recrystallized calcite or dolomite; magnesium-rich varieties may be green from serpentine
Where rockhounds find green marble
1 mapped spotsClassic worldwide localities
- Vermont, USA
- Greece
- Italy
- Ireland
- India
Field-hunting tip
Where it forms: metamorphic belts. If you start seeing calcite, serpentine, dolomite in float, you are in the right ground. In the U.S., the densest reported localities are in Maryland. Start trip planning there.
More green marble photos
Common questions
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Find green marble on the map
RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.
