Corundum Polishing Lap

Corundum Polishing Lap

Flat Diamond Lap

100% of 100

Diamond grinding discs/laps that impart precision results 

Diamond laps/discs are crucial for the grinding, cutting, shaping, faceting, and lapping process of the gemstones. Our electroplated flat diamond laps are the perfect lapidary supplies for stones or cabochons that require a flat surface for precision lapidary operations. These are heavy-duty diamond grinding discs that give faster and precise results. 

Our team of technicians manufactures the flat diamond laps with utmost care and perfection to provide you wholesome worth on your investment as they prove to be durable and long-lasting. They are ideal for faceting, grinding, and lapping all kinds of precious, semi-precious, and synthetic gemstones.

As low as US$10.00
Availability: In stock


  • Diamond laps are circular grinding discs manufactured from high-quality commercial-grade RVD diamond grits, which are electroplated uniformly and firmly.
  • The hardest naturally occurring stone available on earth is diamond. This quality of diamond makes Diamond laps the most effective for faceting, grinding, and lapping all kinds of gemstones.
  • They feature a standard 1/2” arbor hole.
  • They come with a PSA backing plate so that the diamond grinding disc can be easily attached to a backing plate. You have the option of buying an Aluminium backing plate variant in conjunction with the diamond laps available here.
  • The steel plate has a surface width of  0.5mm thickness.
  • They come in two diameters 6” and 8” as a standard product. However, we provide customisation of sizes on request. Contact us to place a custom order.
  • They feature grit size from #80 to #3000, giving you the choice of coarsest grits.
  • Water is the best choice as a lubricator for diamond grinding discs during the process of grinding, faceting, or lapping the gemstones.


  • The diamond grits are embedded with a Nickel electroplating process. Nickel is an element that resists erosion. Hence, these diamond grinding discs do not wear away and provide a clean surface for lapping.
  • Electroplated flat diamond laps allow you durability and freer grinding, faceting, and polishing process.
  • These diamond grinding discs help obtain a flat surface finish on the gemstones. It ensures that there are no semi-reflective or dull grey surfaces while polishing them at a later stage.
  • The surface of the lap, which is composed of steel, has a rigid and robust structure. This provides strength and sturdiness to the diamond laps.
  • They are produced with such precision that they are fixed perfectly parallel to the surface. This flat lap provides a smooth surface for balanced and accurate operation.
  •  These diamond laps do not require any dressing and hence save you the time and effort.
  • Diamond abrasives on the laps produce grinding results faster and in fewer cycles than the other laps.


  • To begin with cutting or grinding, where high stock removal is desired, lower grit diamond grinding discs should be preferred. They are aggressive and aid in grinding the gemstones rapidly. The next step where precise and fine grinding is required, finer grit diamond lap should be chosen for the purpose. So the grit size of the diamond laps should be considered based on the gemstone’s value and grinding purpose. We recommend using finer grit flat diamond laps for expensive gemstones so there is minimum wastage of the stone.
  • They can be installed either vertically on any suitable lapidary equipment or horizontally on flat lap machines as per your need. To avoid any kind of wobbling of the diamond grinding discs while working, you must ensure that the lap is mounted properly and according to the directions.
  • The ideal running speed of the diamond lap should be between 1800RPM - 3000 RPM, which should be decided as per your grinding requirements.
  • A sufficient amount of lubrication with water is beneficial while grinding gemstones as it enhances the grinding/lapping process and yields a finer surface finish. It also eliminates overheating of the diamond grinding disc during the process.
  • In order to achieve superior results while grinding gemstones, it should be ensured that the diamond grinding disc is clean and dust-free. It avoids the possibility of obtaining minutest patches or scratches on the gemstones.


  • Arbor- ½”
  • Diameter- 6” and 8”
  • Depth/Thickness-0.5 mm
  • Ideal Running Speed- 1800 RPM - 3000 RPM
  • Grit - #80, #100, #180, #260, #360, #500, #600, #1200, #1500, #1800, #2200, #3000


  • Time for shipping varies depending on the shipping region but usually, it takes a maximum of 5-7 business days to be delivered anywhere in the world, once it’s dispatched. 
  • The shipping of our flat diamond lap is insured. 
  • These laps are manufactured and shipped from India. For International customers, the fees on import duty or customs charges will not be incurred by us. Every country’s customs policies are different and must be considered by the customers on their own.


  • Drop us an email at or contact us from the website for any assistance. We’d be quick to respond and glad to help.
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