Don’t know what shape to get? The same shapes that are used for diamonds can be found in other Saphire Gemstones as well. Non-diamond Saphire Gemstones have another shape available to them: the cabochon.A is a stone that has been polished but not cut. (That is, it doesn’t have facets.) Cabochons are frequently domed stones. They often have flat backs set in rings or pendants. Although usually used for opaque stones, a few of the translucent stones, especially members of the quartz family and amber, also look good as cabochons. Star sapphires must be polished as cabochons to make the asterism visible, and amber is often polished to show off any interesting inclusions.