Free delivery over £35 on UK orders. We ship worldwide also.

For those in a European Union (EU) country please click here.

This mineral consists of layered accretionary structures formed in shallow water by the trapping binding and cementation of sedimentary grains by biofilms of microorganisms especially cyanobacteria (commonly known as blue-green algae). This can include some of the most ancient records of life on Earth. Featuring a mixture of round and flat polishing, these wonderful tumbles are available in three sizes:-

  • Medium - 20mm by 25mm approximately
  • Large - 30mm by 25mm approximately

Photo is to show natural variation, as one of these fine gems will be picked intuitively.

We have a range of pouches which compliment this item nicely. Click here to see our range.

There are currently no any question about this product.

Shipping starts from as little as GBP 1.46 for UK mainland, and as little as GBP 1.98 for airmail!!!! Postage is calculated by weight and size format of the items in your basket, which is the most fairest method.

All orders are packed & shipped from the United Kingdom. Our postage is calculated fairly, and based on weight of items and packaging that we use. We pack items as best we can, and we take great care to do so. For shipping estimate, you can view in the Shopping Cart page and use the dropdown menu to select your location, and the update button will work its magic for you. We strive to offer same day despatch wherever possible, except weekends. We offer many shipping options upon checkout, and offer worldwide shipping to any location in the world

Returns also accepted. For more information on our policies, please click our link in the customer information at the footer of the page.

Ask a question about the Black Onyx Tumblestone