Bespoke wishstoneBog oak or bog yew wishstone for engraving bespoke message. Maximum space for engraving is 50mm by 25mm. Laser engraving reads clearer on bog yew wish stone which is brighter colour wood. Size of wish stone approx 5. 5cm by 5cm by 3cm The bog yew dates back 4800 years old. Bog oak is 5600 years old. They are the remains or our ancient oak and yew tees what stood on the landscape after the ice age and hidden in the deep bogs for nearly 5000 years.