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Andalusite
Andalusite is a unique gemstone known for its strong pleochroism, displaying multiple colors such as green, brown, and reddish tones from different angles.

About ​

Andalusite

Andalusite is a captivating aluminum silicate gemstone that forms deep within metamorphic rocks under intense heat and pressure. What truly sets this gemstone apart is its extraordinary pleochroism—an optical phenomenon that allows it to display multiple colors simultaneously. Depending on the angle of light and viewing direction, Andalusite can reveal a stunning blend of earthy green, golden yellow, warm brown, and subtle reddish tones, often appearing as a natural mosaic of colors within a single stone. This unique color-play gives Andalusite a dynamic and ever-changing appearance, making each gemstone completely one-of-a-kind. Skilled gem cutters carefully orient and facet the stone to enhance this multi-color effect, ensuring maximum visual impact and brilliance. With a vitreous luster and good transparency, Andalusite offers a refined, natural elegance that appeals to collectors and jewelry designers alike. Its moderate hardness makes it suitable for a variety of jewelry pieces, especially rings, pendants, and earrings when handled with care. Often associated with balance, clarity, and grounding energy, Andalusite is not only admired for its beauty but also for its symbolic significance. Its rarity in fine gem-quality form further enhances its value, making it a distinctive and sophisticated choice for those seeking something truly unique beyond traditional gemstones.

Physical & Chemical Properties

Name Andalusite
Scientific Name Andalusite
Mineral Group Silicate Mineral
Hardness (Mohs) 6.5 – 7.5
Color Green, brown, yellow, reddish (multi-color due to pleochroism)
Origin Spain, Brazil, Sri Lanka, Russia, USA
Chemical Formula Al₂SiO₅

Quick Facts

Crystal System Orthorhombic
Specific Gravity 3.1 – 3.2
Birthstone Not a traditional
Refractive Index 1.63 – 1.65
Optical Character Biaxial (+)
Dispersion Low to moderate
Major Sources Spain (type locality), Brazil, Sri Lanka, Russia, USA
Treatments untreated
Price Range $50 – $500
Care Instructions Avoid harsh chemicals and ultrasonic cleaners. Clean with mild soap and water. Store separately to prevent scratches.
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