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Projects - Tonensia Diamonds


Our Assets

Our Global Appeal

With our world class Jewelry standard, our assets are all over the globe with the latest updates on gems, which gives us a great advantage in choosing the right site to source our gemstones..

Sales & marketing

Our unique cutting & Polishing serves as a Catalyst for increased Sales.

Our Diamond Sales

Diamonds are sold all through the year based on client demands, or via Special stone tenders which are organised by our associates, Exceptional and high-value diamonds are sold via these tenders.

Tonensia continues to enjoy a partnership with high-end clientele, which ensures that the level of services rendered are always maintained.

The cutting & polishing activities creates additional revenue producing capacity that has improved our cutting and polishing margins.

The diamond cutting process

How the diamond cutting process works.

All diamond mines produce gem quality and non-gem quality diamonds. The gem quality diamonds are polished for jewellery while the non-gem quality diamonds are used in industrial applications. Once rough diamonds are recovered from the mine, they go through a separate process to create the polished gem from the rough stone. Diamonds are the hardest known substance at 10 on the Mohs scale of hardness and they are notoriously difficult to facet.  Each step of the manufacturing technique is done with precision to obtain the greatest yield and value from the rough diamond. Computer driven technology, lasers and measurement systems have greatly aided this process in recent decades.


Rough gem quality diamonds are sorted according to their individual characteristics dictated by size, colour, shape and clarity. 


Planning is a time-consuming process because it is one of the most important stages to get right.  The diamond is mapped out with the aid of computer-generated software which shows the cutter the best way to optimise the rough to minimise waste and maximise value of the polished gemstone.


Cleaving is the stage where the rough diamond is split into two parts either using a laser or mechanical saw to allow the diamond cutter to work on individual pieces. 


This part of the process is when the polished diamond begins to take shape. Bruting is performed by rotating one diamond against the other to progressively grind away the excess and make the diamonds round. 


To polish the diamond it is placed on a rotating arm using a spinning wheel to create smooth and reflective facets. This is when the brilliance and sparkle of the diamond is determined. Most diamonds have 57 or 58 facets, however this can vary depending on the shape of the gem.


This is the last stage where the diamond is inspected to ensure it meets manufacturer specifications. If it doesn’t, the polishers must touch up the stone to meet quality control. The stone is then graded by the GIA or AGS and a certificate issued for that specific diamond detailing the 4C’s – colour, cut, clarity and carats.