How to polish a diamond that can be used in jewelleries?

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There is a lot to know about the most popular and coveted rock on the planet. The diamonds that we wear are not how they are found originally. A very important process in making them look that appealing is known as polishing.

  • What is diamond polishing?

Natural diamonds are not found in the sparkly and typically conical kind of shape that we see in advertisements. They are essentially rocks and need a lot of work to make them look like pieces of jewellery. After cutting diamonds into the desired shape, polishing is necessary to bring out the shine in them. The process is also known as ‘brillianteering’. Polishing defines the smoothness of the diamond and if not done rightly, it can also affect the sparkle, making the diamond look duller than others. Natural diamonds have a lot of defects and blemishes on them and polishing helps to subtly smooth them out or make them less evident. Based on this, there different polishing scales as determined by the GIA. They are graded on how evident the visibility of the blemishes in on the diamond. So when you buy your hatton garden engagement ring, make sure to check the polish grading on it too.

  • The process of polishing

Before the invention of heavy machinery, the process of cutting and polishing diamonds used to be done manually using basic tools.The next step was using two main equipment that were a tang and a scaife. So a tang was used to hold the diamond in place and the scaife was a small wheel like machine that spun over the diamond polishing into its facets and making the surfaces according to the cuts as smooth as possible. But even that required some level of manual efforts. But now the world of diamond polishing is as advanced as it could be. With technological advancement, here is heavy machinery that does all the cutting and polishing by itself and simply spits out the ready diamond.

One of the main materials used in diamond polishing are small pieces of diamonds itself. Since it is the hardest rock on Earth, nothing can cut or scrape it better than its counterparts. Other materials include silicon carbide, cerium oxide, tin oxide, aluminium oxide, chromium oxide and a compound o silicon and carbon of a specific hardness value.

  • Steps to polish a diamond
  • Grinding: This is a pre-requisite of polishing. Grinding uses smaller diamond wheels to give the diamond a proper shape.
  • Sanding: Just like sanding furniture, sanding diamonds involves using abrasive surfaces to scrape and polish the imperfections and remove any scratch marks of grinding.
  • Lapping: Faceting or creation of flat surfaces on the stone is done by a process similar to sanding.
  • Final polishing: This is to ensure that the diamond does its main job which is refracting light. For that it has to be polished to a mirror-like finish so the sparkle and shine is evident. Many polishers use a combination of different polishing agents and chemicals depending on the making of the diamond.
  • Grades of polishing as given by the GIA

There are essentially, there are three main grades that determine how a diamond has been polished.

  • Excellent polish grade is one where the defects and blemishes on the diamonds are not seen to the naked eye. They do not affect the appearance, shine and sparkle of the diamond as all, making it look absolutely flawless.
  • Fair polish grade is for diamonds that already have inclusions that are visible openly. He polishing then is comparatively insignificant.
  • Poor polish grade is the worst and basically is just a job done bad where the shine isn’t as much and the cuts and defects on the inside are seen way too evidently for it to pass as a jewellery-grade diamond.

Polishing is a job done by experts and requires specific training for the same. After all these processes are done, the finished stones can then be used in jewellery items and sold in stores such as your favourite Lab grown diamonds hatton garden.

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