An engraver tool — also called a graver or burin — is a hand-held cutting instrument with a hardened steel or carbide tip, used to incise lines, lettering, decorative motifs, and relief work directly into metal or, in the specialist practice of gem engraving, into the surface of a gemstone itself. It is among the oldest precision tools in the jeweller's repertoire, its essential form unchanged since antiquity, though modern metallurgy and pneumatic assistance have refined its performance considerably.

Construction and Materials

A graver consists of two principal components: the shaft and the handle. The shaft is typically a length of high-speed steel (HSS) or tungsten carbide, square, round, or lozenge in cross-section depending on the profile required. Tungsten carbide tips hold an edge significantly longer than HSS and are preferred for engraving hard alloys such as white gold and platinum, as well as for intaglio work on hard gemstones. The handle is traditionally a mushroom-shaped wooden hemisphere that rests in the palm, allowing the engraver to rotate the tool freely while maintaining downward pressure; modern ergonomic handles in resin or aluminium are also in common use.

Profiles and Their Applications

The cutting profile of the tip determines the character of the line or cut produced. The principal profiles encountered in jewellery and gem engraving are:

• Flat graver: A chisel-like tip that produces broad, bright-cut lines with a polished interior face. Widely used for bright-cutting around pavé settings and for lettering.
• Square graver: A square cross-section ground to a point; versatile for general line work and for cleaning up corners in engraved designs.
• Knife graver (or knife burin): A thin, blade-like profile suited to fine, delicate line work and the incision of hair-line details.
• Onglette: An elongated, pointed profile with a slightly rounded belly, favoured for flowing script lettering and scrollwork. The name derives from the French for fingernail, describing the tip's curved underside.
• Round (or scorper): A semicircular tip used to remove background material in relief engraving and to open up channels in channel-set work.
• Bead graver: A small, cupped tip used specifically to raise and form the tiny beads of metal that secure stones in millegrain and bead settings.

Sharpening

Correct sharpening is fundamental to engraving quality. A poorly sharpened graver drags rather than cuts, producing torn rather than clean lines and placing undue strain on the engraver's hand. Sharpening is performed on an Arkansas stone or a diamond-faced sharpening plate, with the shaft held at a precise heel angle — typically between 45° and 60° depending on the profile and the hardness of the material being worked. The face angle (the front cutting face) and the heel angle together determine how aggressively the tool enters the metal and how much control the engraver retains. Many practitioners maintain a small collection of pre-sharpened gravers at different angles for different tasks, rather than resharpening mid-session.

Modes of Use

In traditional hand engraving, the graver is pushed forward through the metal by controlled palm pressure, the workpiece held in an engraver's ball — a heavy, pitch-filled hemisphere mounted on a leather ring that allows the work to be rotated freely in any direction. Curved lines are achieved by rotating the ball rather than redirecting the graver itself, a distinction central to the fluency of classical engraving.

Pneumatic and reciprocating handpieces — notably the GRS AirGraver and similar systems — deliver rapid, low-amplitude impacts to the graver shaft, reducing the hand pressure required and allowing finer control on hard materials. These systems have become standard in professional jewellery engraving studios, particularly for work on platinum and for the detailed relief engraving associated with high jewellery commissions.

Relevance to Gem Engraving

In the allied craft of glyptic art — the engraving of intaglios and cameos in hardstone — diamond-tipped or carbide burins are used in conjunction with a rotating spindle rather than by hand pressure alone. However, the hand graver remains relevant for finishing, undercutting, and detail work even in lapidary engraving contexts. The tool's role in setting gemstones is equally direct: bright-cutting the metal walls of a bezel or pavé field with a flat graver creates the reflective facets that frame and amplify a stone's appearance, a technique central to the aesthetic of late nineteenth- and early twentieth-century jewellery.