Natural Milky Blue sapphire Good cut 6x4mm

Color: Milky sapphire can come in various colors, including blue, yellow, pink, and white. The term “milky” refers to the stone’s hazy or cloudy appearance rather than a specific color.
• Luster: While not as lustrous as transparent sapphires, milky sapphires still possess a vitreous (glass-like) luster.
• Transparency: These sapphires are typically translucent to opaque due to the presence of fine inclusions or tiny crystals within the stone that scatter light.
Hardness: Sapphire, including milky sapphire, ranks 9 on the Mohs scale of hardness, making it extremely durable and suitable for all types of jewelry.
• Crystal Structure: Sapphires crystallize in the hexagonal system and typically form prismatic or tabular crystals.
• Refractive Index: The refractive index of sapphire ranges from 1.762 to 1.770, though the milky appearance can reduce the visible brilliance.
• Density: Sapphire has a specific gravity of about 3.95 to 4.03.

• Geological Formation: Sapphires form in metamorphic and igneous rocks, often found in alluvial deposits where they have been weathered out of the host rock.
• Major Sources: Significant sources of sapphires include Sri Lanka, Myanmar (Burma), Thailand, Australia, and Madagascar.

Durability: Milky sapphires are highly durable due to their hardness, making them suitable for daily wear. However, as with all gemstones, they should be protected from hard impacts.
• Cleaning: They can be cleaned using warm soapy water and a soft brush. Ultrasonic and steam cleaners are generally safe for sapphires, but care should be taken to avoid damaging any settings or other materials in the jewelry.