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Blog Archives
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Lucara rocks!

What a fascinating story! Another unusual aspect of this diamond is the absence of plastic deformation of the diamond. It has a clearly defined crystallographic signature.I thought it prudent in the light of the recent discoveries of large diamonds at Lucara’s  Karowe mine in Botswana to add some interesting content. This is how they extract those […]

To diamonds from DIAMONDS

Historic background When diamonds were first discovered in Lichtenburg, South Africa (circa 1926), it caused a huge rush as prospectors and ‘want to be miners’ rushed to the area to ‘claim’ their fortune. One of those wannabee miners was my late father Flip Botha (Phillip), who decided that farming is just too much work with too little […]

Diamonds – Cutting Diamonds

In one of my earlier posts I wrote about Crystal Planes. The reason we can cut diamonds, that is break the covalent bond of the atoms to separate from the diamond crystal, is due to its particular structure. It is only possible to break the covalent bond in a specific direction. To illustrate this principle I […]

Fancy Color Diamonds – True Body Color

  Some years back I received a Natural Fancy Yellow diamond which was a poorly cut cushion shape. The request from the client was that I re-cut this into a properly cut cushion shape. The copy of the report stated that it was a natural Fancy Yellow. I called the client and informed him that […]

Amazing Reena – Designer and Artist

Look at what our friend Reena has done! She is just amazing! Besides being the top jewelry designer in Canada, she has risen to become the foremost gem artist as well. Check out her latest creation below. http://www.reenaahluwalia.com/blog/2015/10/3/the-portal-of-eternity-a-painting-by-reena-ahluwalia Well done Reena!

Canadian Diamonds – Rough Images

Canadian Rough diamonds have their own distinctive morphology. Unlike some Russian and African diamonds, they are seldom equidimensional. They often have inverted cube faces and sometimes severely irregular forms. But that is just on the outside. The atomic structure is pretty decent and seldom would one have a diamond with lamellar twinning or internal graining. […]

Diamonds – Industry Status

Diamond Prices There has been a steady decline in diamond prices over the past year. Who do we blame for this? Basically the same dynamic that we find in the stock market namely greed and fear. Historic pricing Diamond prices used to be controlled by the CSO (Central Selling Organization) arm of De Beers. Having […]

Diamonds – Facet Definition

‘a diamond is only as good as its worst facet’-Mb   Making Every Facet Count Every facet on a diamond fulfils a specific function. The crown facets are the ‘windows’ of the diamond which let light enter and exit a diamond. The pavilion facets are the ‘work horses’ that reflect light back through the crown […]

What is Wrong With our Steep and Flat Diamond Images

Images of steep and flat diamonds There are a plethora of images on websites, and printed material to show the evils of flat or steep diamonds, but are they a correct rendering of what happens to light in a diamond? Let us put them to the test. We are going to use computer modeling to show […]

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