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.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Green Marble leaves a white streak.
- 3Read the lusterHold the specimen under a strong light. Green Marble typically shows a subvitreous luster.
- 4Match the color rangeCompare against the expected color range: green, dark green, white, black.
- 5Look at form & habitTypical habit: massive.
Often confused with
Green Marble vs. its common look-alikes — and how to tell them apart in the field.
How to tell apart: Streak differs — Green Marble leaves white, Malachite leaves light green; luster reads subvitreous on Green Marble and vitreous 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
- Streak
- White
- Luster
- Subvitreous
- Transparency
- Opaque
- Crystal habit
- Massive
- Cleavage
- None
- Rarity
- Common
- Uses
- Decorative, Lapidary, Construction
- Host rock
- Metamorphic Belts
- Typical price
- $10-50 per slab or polished specimen
Where rockhounds find green marble
1 mapped spotsClassic worldwide localities
- Vermont, USA
- Greece
- Italy
- Ireland
- India
Field-hunting tip
Look in metamorphic belts country — that is the host setting where green marble typically forms. If you start seeing calcite, serpentine, dolomite 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 Maryland — start trip planning there.
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.
