Diamond in Matrix
Diamond (Native Carbon) · Precious Gemstone / Natural Mineral Specimen
Crystal System
Cubic (Isometric); likely octahedral or macle habit partially embedded in matrix
Mineral Group
Native Elements
Chemical Formula
C
Formation Process
Igneous/High-Pressure formation; diamonds form deep within the Earth's mantle (150-200km) under extreme pressure and temperature, then are transported to the surface by deep-seated volcanic eruptions (Kimberlites).
About This Crystal
The specimen shows a colorless to white translucent crystal embedded in a dark, greenish-grey fine-grained matrix (likely kimberlitic). The crystal displays a distinct trigonal growth pattern or 'trigons' on the surface, which is a classic diagnostic feature of natural diamond surfaces. It has an adamantine to greasy luster.
Physical Characteristics
Color: Colorless/White; Streak: White; Cleavage: Perfect in four directions (octahedral); Fracture: Conchoidal; Specific Gravity: 3.52; Tenacity: Brittle; Fluorescence: Often blue under longwave UV.
Optical Properties
Refractive Index: 2.417 (Singly Refractive); Birefringence: None; Dispersion: 0.044 (High fire, though masked by raw state); Luster: Adamantine.
Hardness & Durability
Origin Region
Major sources include the Kimberly region of South Africa, Botswana, Russia (Siberia), Canada (Northwest Territories), and historically the Golconda region of India. Found in Kimberlite or Lamproite pipes.
Hardness & Durability
Mohs Hardness: 10 (hardest known natural substance); Toughness: Good, though prone to cleavage if struck at specific angles; Stability: High.
Care & Maintenance
Clean with warm soapy water or ultrasonic cleaners. While extremely hard, it should be stored away from other jewelry to prevent scratching others. Untreated diamonds are resistant to most chemicals and sunlight.
Rarity & Value
Varies significantly by 4Cs (Color, Clarity, Cut, Carat). Natural crystals in matrix are highly valued by mineral collectors. Commercial gem quality is uncommon; large, clear specimens are very rare.
Special Characteristics
Features characteristic 'trigons'—triangular etch pits or growth marks on the crystal faces—which are visible in the image. Adamantine luster is highly distinctive.
Lore & History
Historically used as a symbol of invincibility and power. First recognized in India over 3,000 years ago. In crystal healing, it is traditionally associated with the Crown Chakra, purity, and amplifying the energy of other stones.