This is a large cabochon but it is thin. The slab I purchased was cut too thin by the seller so I could not apply a dome to this stone at all. It is very flat. However, it is very interesting but more than likely would require a solid back to support the stone when creating jewelry with it. It measures 55 x 45 mm and is 2.5 mm thick. It is an ivory color with some rust colored lines running through it as well as some milky areas.