Rough howlite

rough howlite price per kilo
Howlite is a striking and versatile mineral with both geological and metaphysical appeal. Here’s a detailed look at its characteristics:

🧪 Scientific Profile

• Chemical Composition: Calcium borosilicate hydroxide (Ca₂B₅SiO₉(OH)₅) 
• Crystal System: Monoclinic, though crystals are rare and typically small 
• Hardness: 3.5 on the Mohs scale
• Luster: Subvitreous to glimmering
• Streak: White
• Specific Gravity: 2.53–2.59
• Fracture: Conchoidal to uneven
• Diaphaneity: Translucent to opaque

🌍 Geological Formation

• Origin: Discovered in 1868 by Canadian chemist Henry How in Nova Scotia 
• Formation: Occurs in evaporite deposits formed from the alteration of volcanic ash
• Associated Minerals: Often found with gypsum, calcite, and quartz

🎨 Appearance

• Typically white or grayish-white with fine gray or black web-like veining