Grenadill, African Blackwood
Please mind a few hints on working on hardwoods: all very hard and dense woods tend to develop cracks while working on especially thick diameters (e.g. 60 x 60 mm or more). You will have to expect hairline cracks on open end grain surfaces while storing the wood in central heated warm rooms with low air moisture values. Please you do not expose wood to sudden and strong temperature changes and humidity alterations and always keep the end grain sealed with wax or a thin coating of white wood glue.