i Register
In some senses, gemcutter is marked as obsolete. Watch for register when choosing this word.
noun
A lapidarist who cuts gems, usually precious or semiprecious, to make them suitable in size, shape, color and appearance, usually for use in jewellery such as rings or earrings.
He's a typical gemcutter, mostly diamonds but some emeralds and the occasional sapphire or ruby.
A lapidarist who creates hardstone carvings or miniature sculpture from gemstones such as jade.