A loupe is essentially a magnifying glass specifically designed for viewing gemstones. Loupes are available in a variety of magnifications, for instance, seven times magnification indicated as 7X, ten times magnification indicated as 10X, 20 times magnification indicated as 20X. The world standard for loupe magnification when viewing diamond is 10X and therefore is the […]

Why is the hardness of a gem important?

The relative hardness and therefore durability of a gem can influence what gem you choose, what setting you use, when you wear the gem and how best to store your jewellery. Some gems have a far greater value than others and are used predominantly for expensive to top end jewellery. Price or value is a […]

Synthetic ( laboratory grown) coloured gemstones

There are a significant number of precious and semi-precious gemstones that can be manufactured by man. These synthetic gemstones have essentially the same optical, physical, and chemical properties as the natural counterpart. However, there is a large difference in price between the natural and synthetic, particularly when it comes to the precious gems. Click here […]


Fluorescence is a form of luminescence. This is a term describing any emission of light by a substance that is not the direct result of incandescence. Diamonds that are exposed to ultra-violet light (long wave or short wave) may glow, showing a certain degree of fluorescence. Fluorescence is caused by electron activity inside a gemstone, […]

Gems by colour range

Did you know that when choosing a gemstone for a piece of jewellery that you will have a choice of gems that fit into the colour range you are looking for? If you were looking for a blue gemstone, and depending on the depth of colour you require, you would have nine different gemstones that […]

Diamond – the birthstone for the month of April

The most sought-after gem in the world and regarded as the gem for engagements and major family events. Diamond is the birthstone for April and the anniversary gem for the 10th and 60th year of marriage. Click here to view full article. Diamond – April birthstone

Treatment of gems – accepted or not accepted?

Some gemstones are routinely treated, and the treatment is well known and accepted in the gem and jewellery industry. However, there are some treatments that are not routinely done and must be disclosed to the buyer by the seller. The common treatments that must be disclosed by the seller include glass filling, oiling, resin filling, […]

Terms used in the gem and jewellery trade

To the layman, these terms have no special significance, however to purchasers or those involved in the sales of jewellery or gemstones, they may have significant meaning. Natural A gem formed completely by nature without human intervention during the formation. Synthetic A laboratory grown gem that essentially has the same chemical, physical, and optical    properties […]

Red Diamonds, rare and expensive

Do you know that red diamonds are the rarest in the world and the most expensive?The price of red diamonds is approximately three to four times the price of the other fancy coloured diamonds of which the blues and pinks are the most expensive. Click here to read full article –Red diamonds 

Why laser inscribe a diamond?

There are several reasons why a diamond may be laser inscribed. It is routinely done by some gem certification laboratories who laser the gem report number onto the girdle of the diamond so that the laser number can be matched with the unique gem report number. This is important for the buyer because he can […]