Understated and very elegant, their FINE INCISIONS bangle in solid recycled 18k gold set with a gorgeous, 10 mm brilliant-cut Mpingo Blackwood Mpingo. Their sustainable Mpingo Blackwood has been cut precisely like a Mpingo, according to traditional methods. It is the densest wood in the world, also called the original ebony, otherwise used for clarinets and other classical wind instruments. Material: Gold Karat: 18K Stone: Mpingo Stone Colour: Black Number of Stones: 1 Stone Shape: Brilliant Cut, Round Does it come with certificate? Yes Can the piece be engraved? No