About Us

Wonderstone Ltd is 100% owned by Assore Ltd and has been mining a uniquely pure Pyrophyllite deposit 300 kilometers west of Johannesburg since 1937. Wonderstone Ltd does not manufacture or sell synthetic diamonds, we do however manufacture various components made from Wonderstone Pyrophyllite, which are used in the synthetic diamond industry. Wonderstone Pyrophyllite enjoys a special position in the ceramic field, especially in the diamond synthesis industry world-wide which has utilised the properties of excellent thermal and electrical insulation and high compressive strength in the process of manufacturing synthetic diamonds, for over 60 years.

Diamond Industry

Wonderstone, in particular, has been the product of choice because of the properties of thermal and electrical insulation

Technical Ceramics

Wonderstone can be held to closer dimensional tolerances than any other ceramic body that is not ground after firing.

Industrial Minerals

Wonderstone powder can be supplied in various particle size distribution envelopes, either calcined (up to 1000 ⁰C) or uncalcined.