Tag Archives: Diamonds

Your First Choice For Engagement and Wedding Rings

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From unique handcrafted Engagement Rings to beautiful bespoke Wedding Rings, we will work with you to create your dream ring.

We will help you design an Engagement Ring that will be treasured for generations to come. If we don’t have the perfect ring already in our extensive range, we would love to design and craft the one to suit your style. With Global Diamonds you can choose the stone from a large selection of stones available at the best price, all sourced from ethical suppliers.

Our experienced team of Jewellers and Designers, including a Master Jeweller and a Stone Setter in our on-site workshop, will help you choose the perfect stone within your price range. We can help with the design and are also happy to draw inspiration from pictures that you supply. We also offer a full design draw service so you can get a real idea of what we are planning and work together to plan that perfect piece.

If you already have your Engagement Rings then Global are more than happy to create Wedding Rings to match. We hold a large physical stock of these and we love to make each one to fit you and match your existing ring perfectly.

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We can also remodel old rings if you wish to incorporate heirloom jewellery in your wedding set.

With a talented and experienced team onsite, you will be looked after every step of the way.

Great Service… Best Prices…..Quality Workmanship

 

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Birthstone for April – the Classic Diamond

The Beautiful Diamond

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The Diamond, the most famed and fabled of all gemstones, is very unique in many ways. Renowned for being the hardest substance on earth, its sparkling fire, durability, and rarity make Diamond the most prized of all gems. No gemstone contains as much allure and interest as does Diamond.

Most Diamonds used as gemstones are colourless or very faintly coloured. However, coloured Diamonds, known as “fancies”, can be extremely rare and valuable, and the most valuable gemstones ever known have been fancy Diamonds. In fact, fancy Diamonds are the most valuable substances known to man, with vivid coloured Diamonds historically being sold for more than a million dollars per carat!

As the April birthstone, Diamonds are the ideal gift for a loved one.  And now you have more choices than ever. Get creative and give the ultimate gift of beauty: a fancy-colour diamond. Fancy-colour Diamonds are natural, rare and truly exotic gem of the earth.  Diamonds in hues of yellow, red, pink, blue, and green range in intensity from faint to vivid and generally the more saturated the colour, the higher the value. In fact, Diamonds sparkling with intense colour are rare and may be priced higher than a colourless Diamond of equal size.  Because fancy-colour Diamonds are very desirable, colour is sometimes introduced in a laboratory. These are correctly called Colour-treated Diamonds. When purchasing a fancy-colour Diamond, the shopper should ask if any enhancements or treatments were used to improve its colour and/or clarity.

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We have a large stock of beautiful unset Diamonds, ready for your special design, and we also have many items of stunning jewellery in stock now.

 

Crystal Structure

There is a “5th C” of diamonds seldom discussed, but very important to understand before making any diamond purchase. This is called “Crystal structure”

Not all diamonds have the same quality crystal structure. This means that two diamonds with exactly the same grades may have a completely different look and value. A poor crystal structure leaves a diamond looking milky and lifeless, even if the other 4 grades (4 C’s) of the diamond show good quality. A diamond with a very good crystal structure will have transparency through the stone, making it look full of life and beautiful.

The issue for the consumer is that there is no accounting for crystal structure within a diamond grading report. It is up to the individual to recognise the difference, or use an experienced and reputable company from whom to purchase.

We are beginning to see more and more diamonds enter the jewellery market that should have been rejected and used in the industrial product market (remember poor quality diamonds are used for industry tools such as grinding disks etc.)
How does this effect your purchasing decision?

It does so in two ways

1. When buying online, make sure you are buying from a supplier who has physically seen all the diamonds being sold in their database. Try to avoid merchants who list from a simple global database. A global database is a listing of diamonds for sale from diamond suppliers around the world. The point here is, even the most experienced diamond salesman cannot guarantee the crystal structure of a diamond if he/she has not seen it themselves. Never pay a deposit or buy a diamond from a merchant without seeing the diamond in the country first.

2. Never buy a diamond from a classic “Trade-me” type seller who has limited diamond knowledge or access. Unfortunately, through lack of experience, these sellers often find themselves associated with suppliers of industrial diamonds. These suppliers are now finding it more financially rewarding to sell their industrial grade diamonds in jewellery sets to E-bay and Trademe stores alike.

When purchasing from Global Diamonds, you are using our experience and reputation to ensure you only purchase a diamond with excellent crystal structure.

Fluorescence in Diamonds – What does this effect?

“Those diamonds that produce a visible reaction when exposed to ultraviolet radiation. In laboratory experiments with both trained gemologists and individuals with no diamond experience (meant to represent the jewellery-buying public), no relationship was found between fluorescence and a diamond’s overall appearance. Diamonds with a strong or very strong fluorescence are a better value for the end customer because the market prices them slightly lower than diamonds with faint or negligible fluorescence”.

So What Does that mean for My Diamond……

Fluorescence is a greatly misunderstood concept. Fluorescence is the reaction of trace minerals within the diamond that cause the diamond to glow when exposed to ultraviolet light. In the laboratory, special ultraviolet lamps are used to check for this but the sun is also a source of ultraviolet rays so diamonds will react in daylight as well. About one third of all diamonds fluoresce. Of these, the most common color is blue, but diamonds can fluoresce other colors. More than 95% of those that do fluoresce will fluoresce blue. The next most common color is yellow. Any other color of fluorescence would be rare.

There are some educational sites or selling sites that discuss fluorescence as a negative value factor. When a diamond fluoresces blue it has a tendency to appear higher in color than its true body color. This is a good thing. However, many years ago, fluorescence was thought to be a negative, and the reasons can only be speculative. One such reason was that it was thought that perhaps the color grade assigned was lower than its apparent color, so people were fearful that they would be paying too much for a diamond. For example, a J color diamond might look like an H or an I color if it had fluorescence. But as long as the diamond is correctly graded as J, then the fluorescence is really like a bonus. The diamond looks higher in color than the price suggests.

Two factors should be considered regarding fluorescence. The first is the color of the fluorescence. If the diamond fluoresces blue, it may be a positive factor since it will make the diamond look whiter. However, note that there is still a stigma against fluorescence and some people will simply not buy the diamond and some sellers will offer a discount for fluorescent diamonds in the higher colors. If the diamond fluoresces yellow, this is a negative factor because the diamond will look lower in color in ultraviolet light.

The second factor is the strength of fluorescence. The range of strengths as reported on laboratory grading reports is None, Faint, Medium, Strong, Very strong (As shown below). Some labs use the term Negligible for any diamond with no fluorescence or faint fluorescence. Sometimes when a diamond has very strong fluorescence, the diamond will have an “oily” look to it, even in normal lighting conditions. When this happens, a negative value is expected. The range of discounts that might be realized are anywhere from 0% to 15%, but a large discount is rare. Occasionally, a slight premium of 1% to 3% might be added for a diamond that is in the lower color grades but exhibits fluorescence.

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If you have any further questions about Fluorescence or any other Diamond matters please reply to this blog or contact us through the Contact Us tab and Get in Touch.