Peridot in Matrix
Olivine var. Peridot · Semi-Precious Gemstone and Mineral Specimen
Crystal System
Orthorhombic, granular to massive crystal habit with rounded grains
Mineral Group
Silicates, specifically Nesosilicates
Chemical Formula
(Mg,Fe)2SiO4
Formation Process
Igneous formation deep within the Earth's upper mantle under high temperatures and pressures, brought to the surface via volcanic activity
About This Crystal
The specimen features vibrant, lime-to-olive-green granular peridot crystals embedded within a dark basaltic matrix, showing translucent to transparent small crystals with a vitreous, oily luster and sugary texture
Physical Characteristics
Color ranges from bright yellowish-green to olive green with a white streak, poor cleavage, conchoidal to uneven fracture, specific gravity of approximately 3.3 to 3.4, brittle tenacity, and no significant magnetism
Optical Properties
Biaxial positive with a high refractive index ranging from 1.650 to 1.70, strong birefringence, and no notable pleochroism or special optical phenomena
Hardness & Durability
Origin Region
San Carlos Apache Indian Reservation, Arizona, USA, as well as Pakistan, China, and Myanmar; found in upper mantle xenoliths and basalt flows
Hardness & Durability
Mohs hardness of 6.5 to 7, fair to good toughness, sensitive to rapid temperature changes (thermal shock) and acids, making it moderately durable for jewelry with careful handling
Care & Maintenance
Clean with warm, soapy water and a soft brush; avoid ultrasonic or steam cleaners, harsh chemicals, and sudden extreme temperature changes
Rarity & Value
Common to uncommon depending on size and clarity; faceted stones are valuable when large and clean, while mineral specimens are generally affordable and widely available
Special Characteristics
High birefringence which causes a noticeable doubling of facet edges when viewed under magnification, and its origin as a mantle-derived mineral formed deep inside the Earth
Lore & History
Historically known as the gem of the sun by ancient Egyptians, associated with light, protection, and emotional healing; linked traditionally to the heart chakra in crystal healing practices