Making Slate Keyrings from Small Polished Offcuts

Why Slate Offcuts Deserve a Second Life

Anyone who works with slate ends up with a tin of small, awkward pieces. Tiles cut down for coasters, trims from a hearth surround, corners snapped off a larger engraved panel — they are too good to bin and too small to become much on their own. Keyrings are the perfect answer. A blank around 30mm by 50mm is ample for a name, a house number, a date or a simple motif, and the weight is satisfying in the hand without dragging a pocket down.

Slate also holds up beautifully to daily handling. It resists water, does not mind being knocked about with keys, and its riven face develops a soft sheen rather than wearing flat. If you already polish larger pieces, the offcuts are essentially free material, and a batch of twenty keyrings can come together in an afternoon once your process is settled.

Selecting and Preparing Your Blanks

Start with pieces between 3mm and 6mm thick. Anything thinner than 3mm will chip at the drill hole; anything thicker than 8mm feels like a paperweight in a pocket. Aim for a finished size of roughly 25–35mm wide and 40–60mm long, which sits comfortably in the palm and leaves room for a 4mm hole set about 8mm in from one short edge.

• Inspect for flaws: reject pieces with hairline cracks, deep delamination or pyrite flecks that crumble when scratched with a nail.
• Mark the drilling point: use a pencil and a small square, or make a simple plywood jig with a nail hole to keep every blank consistent.
• Round the corners: a belt sander or a diamond hand pad at 120 grit will soften sharp points in a few seconds per corner. Sharp corners snag pockets and chip easily.
• Keep a dust mask and water handy: slate dust is fine and unpleasant. Work wet wherever you can.

Once shaped, wipe each blank with a damp cloth and let it dry fully before drilling. Wet slate drills more cleanly, but you want the surface dry enough to see your pencil mark.

Drilling a Clean Hole Without Splitting the Slate

The single most common mistake is using too much speed and too little support. Slate is brittle and layered, so it will blow out the underside if you rush. A 4mm diamond-tipped bit or a sharp masonry bit will do the job, but the technique matters more than the tool.

• Lay the blank flat on a scrap of softwood or a cork tile so the bit exits into something forgiving.
• Place a strip of masking tape over the drilling point to stop the bit wandering on the riven surface.
• Run your drill at a slow speed — around 500–800 rpm on a variable-speed cordless — with light, steady pressure. Let the bit cut rather than forcing it.
• Keep the point cool by dipping the bit in water every few seconds, or drill with a shallow puddle of water around the hole.
• Ease off as you break through the final layer. Backing the exit with a scrap of wood reduces chipping dramatically.

If a corner does chip, do not panic — a slightly larger hole or a decorative chamfer with a countersink bit will tidy it. Test your first three holes on scrap pieces from the same tile so you learn how that particular slate behaves.

Fittings, Rings and Hardware

A 4mm hole takes a 25mm split ring comfortably, but the more professional look comes from a two-part assembly: a small jump ring through the slate, then a split ring or a swivel clip through that. This spreads the load and lets the keyring hang flat instead of twisting.

• Split rings: choose 20–25mm stainless steel. Brass and antique bronze finishes pair beautifully with grey slate.
• Jump rings: 6–8mm, 1.2mm wire, opened with two pairs of pliers rather than your fingers to avoid marking the metal.
• Swivel clips or ball chains: useful if the keyring doubles as a bag charm or a zipper pull.
• Optional reinforcement: a tiny drop of clear epoxy around the hole on the underside adds security if the slate is particularly flaky.

Close jump rings properly — a gap of even a millimetre will let the ring work loose over months of use.

Sealing Edges and Finishing the Surface

Raw cut edges are the giveaway of a rushed job. They feel gritty and absorb handling oils unevenly. Sand them through 240, 400 and 800 grit diamond pads, working wet, until they feel smooth but still matte. A light rub of beeswax or a food-safe mineral oil brings out the deep charcoal tones and darkens the slate slightly, which most people find very attractive. For a more hard-wearing finish, a thin coat of matt acrylic lacquer or a stone sealer will protect the surface without looking plastic.

Leave the riven face alone apart from a good clean — the natural texture is the whole point. Buff the whole piece with a soft cloth and check the hole for any burrs before fitting the ring.

Personalising and Presenting Your Keyrings

This is where small slate pieces become genuinely special. Shallow hand engraving with a diamond burr, a paint-filled carved initial, or a stamped date all work well at this scale. Keep lettering at least 4mm high so it stays legible, and sketch it in pencil first. White or metallic gold acrylic paint pressed into engraved lines and then wiped back gives crisp, high-contrast results.

For gifting, stack keyrings with a small card explaining the slate's origin — many buyers love knowing it came from a Welsh quarry or a reclaimed roof. Wrap in tissue and a kraft box, and include a one-line care note: wipe with a damp cloth, avoid harsh chemicals, and re-oil once a year. They sell well at craft fairs, make thoughtful wedding favours, and turn a workshop's scrap pile into something people actually keep in their pocket for years.