Blue Howlite (Dyed)

Physical Properties

Hardness: 3.5 on Mohs scale; Color: Naturally white with grey/black veins (dyed blue here); Luster: Sub-vitreous to dull; Crystal structure: Monoclinic; Cleavage: None/Indistinct.

Formation & Geological History

Formed in evaporite deposits in arid environments. Natural howlite is frequently found in nodules that resemble cauliflower. Most commercial turquoise-colored howlite is chemically dyed to mimic more expensive gemstones.

Uses & Applications

Used primarily in decorative jewelry, beads, cabochons, and as a 'simulant' for turquoise or lapis lazuli due to its porous nature which absorbs dye well.

Geological Facts

Howlite is named after Henry How, a Canadian mineralogist who first described it in 1868. In its natural white state, it is often marketed as 'White Buffalo Turquoise' despite having no geological relation to turquoise.

Field Identification & Locations

Identify in the field by its nodular shape and low hardness (scratched by a copper penny or knife). If dyed, color often concentrates in the 'veins' of the rock. Commonly found in California and Nova Scotia.

Identified on: 4/22/2026

Mode: Standard