Skip to content

Howlite Tumbled Gemstones


Howlite is a calcium borosilicate hydroxide (Ca2B5SiO9(OH)5), is a borate mineral found in evaporite deposits. The most common form of howlite is irregular nodules, sometimes resembling cauliflower. It is commonly used to make decorative objects such as small carvings or jewellery components.

These top quality, consistently sized tumbled gemstones are supplied loose. Each stone is approximately 2.5cm - 3cm.