300mmx32mm Diamond Groove Cab Laps For lapidary Bead

Achieve professional, optical-quality finishes on the world’s hardest gemstones with the Diamond Star® Grooved Cab Laps—premium 300mm x 32mm electroplated diamond polishing discs trusted by lapidary artists, jewelers, and gem cutters worldwide.

Specially engineered for final shaping and high-luster polishing of sapphire, ruby, garnet, topaz, spinel, and other corundum-group materials, these laps outperform conventional polishing discs. The secret lies in their radial groove pattern, which enhances slurry flow, prevents glazing, improves cooling, and ensures consistent cutting action across the entire surface—even during extended use.

Each lap features a precision-machined steel core for true flatness at high rotational speeds, paired with a durable electroplated diamond layer that maximizes diamond exposure for aggressive yet controlled material removal. Unlike resin-bond or sintered alternatives, the electroplated design delivers faster results and longer service life when working with high-value, abrasive-resistant stones.

The 300mm (12") diameter provides ample working area for cabochons of all sizes, while the 32mm center bore ensures compatibility with most European and industrial flat lap machines. Need to fit a 1/2" or 5/8" arbor? Standard adapters are readily available.

Recommended Use:

• Use with water-based lubricant or specialized lapidary slurry
• Ideal for progressive polishing stages (pair with coarser laps for shaping)
• Best results at moderate to high RPM (per your machine’s specifications)

Part of the renowned Diamond Star® series, these cabbing laps are a staple in serious lapidary workshops—where precision, durability, and finish quality are non-negotiable.

Key Applications:
✔ Polishing sapphire & ruby cabochons
✔ Finishing garnet, topaz, and quartz
✔ Restoring high-refractive-index gemstones
✔ Professional jewelry and custom stone work

Upgrade your cabbing workflow with the lap professionals rely on—Diamond Star® Grooved Cab Laps: where innovation meets the art of stone.