Green Marble and Slate
Metamorphic Rock (Calcitic/Dolomitic Marble and Slate) · Decorative Stone and Architectural Material
Crystal System
Trigonal (Calcite component) and Monoclinic/Triclinic (Silicate minerals)
Mineral Group
Carbonates and Silicates
Chemical Formula
CaCO3 (Calcite) with serpentine impurities / Al2SiO5 and quartz (Slate)
Formation Process
Regional and contact metamorphism of limestone (for marble) and shale or mudstone (for slate)
About This Crystal
The image shows a decorative object shaped like a fish, expertly crafted from polished natural stone. It features contrasting bands of mottled deep green marble with white veining (ophicalcite or serpentine marble) on the head and tail sections, and a dark grey to black banded slate in the central body section.
Physical Characteristics
Colors range from vibrant forest green to dark greyish-black. Streak is white. Luster is vitreous to sub-vitreous when polished. Cleavage is perfect in the calcite component along rhombohedral planes. Specific gravity ranges from 2.7 to 2.8 for the marble components.
Optical Properties
Biaxial negative for calcite; translucent to opaque with attractive decorative banding and swirling patterns.
Hardness & Durability
Origin Region
Global distribution; prominent green marble varieties from India, Italy, and Greece
Hardness & Durability
Mohs hardness is around 3 for the calcitic marble sections and about 3 to 4 for the slate sections. Susceptible to scratching by harder materials and etching by acids.
Care & Maintenance
Clean with a soft damp cloth and mild soap. Avoid acidic cleaners, vinegar, lemon juice, and harsh chemicals. Not recommended for dishwashers.
Rarity & Value
Common, widely available as decorative items, tiles, and countertops. Value is based on craftsmanship and the aesthetic quality of the stone rather than mineral rarity.
Special Characteristics
Polished decorative stone displaying natural swirling patterns (cipolin texture) in the green portions and planar foliation banding in the central dark section.
Lore & History
Marble has been used for thousands of years in architecture and sculpture by ancient civilizations including the Greeks and Romans. In metaphysical lore, green marble is often associated with emotional balance, grounding, and prosperity, though these are traditional beliefs rather than scientific claims.