Perles en hypersthène, petits galets aventurine verte Türkiye Howlite can be confused

Türkiye Howlite can be confused with: - Magnesite Treatments that exist to modify howlite: - Dye (imitation turquoise and lapis lazuli)

Color: Shades of beige and brown to light

A limestone composed almost exclusively of fossilized shell fragments

Forme: Indéfinie

silky Cleavage: None Polariscope: Anisotropic (restores all 90°

Perles en hypersthène, petits galets aventurine verte Türkiye Howlite can be confusedHypersthene beads, small pebbles Color: Gray, black Size: 7 8mm Country of origin: Canada Gemological information on hypersthene: Possible color: Gray, green, brown, black Density: Between 3. 43 and 3. 90 Hardness: Between 5 and 6 Crystal system: Orthorombic Breakage: Irregular Cleavage: Perfect Polariscope: Anisotropic Refractive index: np: 1. 686 to 1. 755 nm: ? ng: 1. 703 to 1. 772 Birefringence: 0. 015 to 0. 017 Chelsea filter: Spectrum: Strong