Jewellers' Network

Category: Gemstones

Reviewing the Federal Trade Commission (FTC) jewellery guides

BY CRAIG THOMAS

With the Federal Trade Commission (FTC) having recently made several revisions to its jewellery guides, let us take this opportunity to have a look at the most relevant changes.

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Tanzanite IS ONE OF THE RAREST GEMSTONES ON EARTH

Found only in Tanzania, this African gemstone has a beautiful range of colours, from deep blue to light blue and lilac, indigo and violet.

The attraction of this gem with tourists to our shores, has given them a real African treasure to take home. If your clients are lucky to celebrate their birthday in December then this gemstone will make the perfect birthstone gift. Continue reading…


Tanzanite: December Birthstone

If your clients are lucky to celebrate their birthday in December then this gemstone will make the perfect birthstone gift. Found only in Tanzania, Tanzanite is one of the rarest gemstones on earth. This African gemstone has a beautiful range of colours , from deep blue to light blue and lilac, indigo and violet. Continue reading…


The Festive Season’s Coming, And We’re Giving You An Early Present!

The Festive Season’s Coming, And We’re Giving You An Early Present!

In today’s world, where everyone’s out to make a quick buck and no one seems bothered with customer service anymore, we at The Gem Lab like to feel we’re a little different. We still hold on to old-fashioned values, and we believe in offering services to the gem and jewellery trade that are of real and genuine value to you. Continue reading…


Citrine, the birthstone of November

Citrine, the birthstone of November with the fire of the sun is known to bring hope strength, vitality and energy to the wearer.

This rich golden colour gem has made it a stunning summer birthstone jewellery gift. Continue reading…


Opal and Tourmalines are the modern birthstones for October

Opals are unique because the spheres of silica diffract the light to give off an iridescence of colour making each one unique in its own way. This makes it a wonderful birthday gift.

Tourmaline derived from the term ‘Turmali’ which means different colour crystals. They are found in all colours of the rainbow which can suit anybody’s fashion and tastes .With the trends of pink gemstones, the pink shades of tourmaline have become very popular. Continue reading…


In The Gem Trade, It’s Not Only The Stones That Need To Sparkle

In South Africa, it’s easy to find things to moan about, but we have to work a little harder to find reasons to smile. One of the biggest reasons for the gem trade to feel happy is that the 2018/2019 tourist season is set to be a good one. The Cape’s water crisis is easing, and the exchange rate (while not so great for us) means visiting South Africa and buying jewellery is more affordable than ever for overseas visitors. Continue reading…


The art of the con

by Craig Thomas (FGA)(GD)(AJP) Head of Laboratory A.G.L.


There are many different techniques used by con-artists. These are the three approaches most often employed in our industry.

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Gem and Jewellery Valuation Incentive

At The Gem Lab, we specialise in professional gem and jewellery appraisals, and we do many valuations for jewellers on behalf of their clients. This means the jewellers don’t have to take time away from their store, possibly losing business as a result, while their clients are assured of a professional, certified, same-day evaluation.  Continue reading…


Sapphire: Birthstone of September

As a symbol of Love and Purity, Sapphire makes one of the best birthstone gifts.

Almost as hard as a diamond and durable to wear everyday it makes a great alternative to diamond with engagement and anniversary rings. It’s found in most colours of the rainbow. Blue and Pink are the most popular choices. Continue reading…


We’re Not Sympathetic Towards Synthetics!

There is definitely cause for concern in the gemstone industry. Recently, we’ve noticed a marked increase in the number of synthetic and fracture-filled gemstones being brought in for verification after they’ve been sold as natural and untreated.  

Known as Verneuil, these simple synthetics have been around since the late 19thCentury and were first accepted as synthetic in 1902. Unfortunately for those of us in the gem trade, the synthesising process has got better and better over the years, making synthetic stones increasingly difficult to identify. The earlier synthetics, which is what we’ve been seeing a lot of in the lab recently, are happily much easier to spot – if you know what to look for. Fracture-filled rubies, for example, often have more glass filling in them than actual ruby! In the industry, these are known as “composite stones.” Continue reading…


PERIDOT THE BIRTHSTONE OF AUGUST

Ancient Egyptians mined them in Egypt and as their national gemstone it was known as the ‘Gem of the Sun’.

A symbol of strength bringing happiness, good cheer, attracting love, improving eyesight and freeing the mind of envious thought are just some of the mystical wonders of this gem. Continue reading…


Tanzanite Imitations Cultured Pearls

BY Craig Thomas (FGA)(GD)(AJP) Head of Laboratory A.G.L.

Ever since man has valued gems there have been those that try to deceive potential buyers with imitation gems, and tanzanite is no exception. So let’s take a look at some of the potential candidates as tanzanite imitations. Continue reading…


Be Ahead Of The Game!

Tanzanian President John Magufuli ordered his military to build a wall around his country’s Tanzanite mines. This is apparently in response to an increase in illegal mining, smuggling and other irregularities.

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J.P.P.E – The Birthstone of July is Ruby

The Ruby is considered the Gem of Royalty thought to bring Good fortune, courage and passion to its wearer. The ruby is the most valued gemstone.

The Burmese Ruby with its warm bright deep red colour with a slight blue hue is often call the ‘Pigeon blood ruby’ where the name is derived from the colour of a white pigeons eye and not by its blood as commonly believed. These Rubies are usually the most valuable and sought after. Continue reading…


There’s A Gem Lab On Your Stoep!

For some reason, many South Africans labour under the misconception that if something comes from overseas, it must be better than anything we can buy here. We love knowing that something is “imported,” which means it must automatically be more luxurious and desirable. I personally can’t understand this. South Africa has a wealth of knowledge and skills that produces an incredible variety of quality goods and services – all at a fraction of the price of the imported stuff. Continue reading…


J.P.P.E – THE BIRTHSTONE FOR MAY IS EMERALD

The word Emerald is derived from the Greek word “Smaragdos” which means “green stone”. The Emerald is a member of the Beryl (beryllium aluminium silicate) family. Elements of chromium in the crystal produce the colour, while inclusions in the stone create what is called the jardin, or garden, of the emerald. Continue reading…


It’s Time To Invest In Yourself

Well, there’s no denying that summer is now behind us, and we’re heading full speed into autumn and winter. A couple of the more traditionally hectic periods on the jewellery calendar – such as Christmas and Valentine’s Day –  are behind us for the moment, so you should have a little more time and energy on your hands right now. Continue reading…


Ethiopia: A New African Treasure Trove

First printed in ‘Gems and Jewellery’

Cell: 082 490 0219   |   Tel: 011 465 0208
Email: info@agemlab.co.za  |   Web: www.agemlab.co.za
Address: Suite 8, 4th Floor, Block E, The Pivot Office Park, Montecasino, Fourways, JHB Continue reading…


Quartz Crystals by Arthur Thomas

ARTHUR THOMAS

Fellow, Gem-A(GtBr)  /  Graduate gemologist GIA (USA)  /  Certified Evaluator (SA)
Email: arthurthomasgems@gmail.com  /  Tel: (011) 784 0172  /  Cell: (082) 469-6024 Continue reading…