Tag Archives: diamond rings

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.

Platinum vs Gold

Platinum vs Gold is a very personal choice.  Platinum is generally more expensive than gold as it is heavier (therefore uses more) and it is usually 95% pure when made into jewellery, compared to 75% for 18ct gold.  However there are pro’s and cons to both.

Platinum will wear better than gold over the decades as it is a more dense metal.  Platinum is a much whiter metal than white gold, but it does have a grayish appearance when it wears.

White gold has a yellowish appearance in its raw form.  This is why most white gold is rhodium plated, which gives it a very white appearance.  Rhodium plating is however only a temporary plating and will wear over time. This is why we use a Platinum based white gold which is white even in its raw form and doesn’t need a Rhodium plating new or at any point over time.

From a personal point of view, we feel that a brand new white gold ring looks sharper than a brand new platinum ring.  However the real benefit of a platinum ring is its durability over time.

All in all, both metals produce a stunning look and it is important to keep your jewellery clean and polished.

There has always been this perceived belief that Platinum is a superior metal to gold, and it is commonly used by the rich and famous.  Perceptions aside, white gold can look just as stunning and in many cases it is still a preference in its look.

Does Gold scratch easier than Platinum

There is a bit of a myth out there that Platinum is harder than gold, and therefore doesn’t scratch as easily.  Platinum is actually softer than gold but it is more dense in nature.  Therefore it scratches just as easily as gold but the metal only displaces rather than wears away with a scratch.

In conclusion, both are very nice metals, but both need to be maintained to look their best.  The cost of maintenance is very similar.  Platinum will last longer over time and has a heavier feel to it.  The rest of the decision is just a personal choice and to many, a cost related issue.

Coloured Diamonds: Good, Bad, or Fad?

Round brilliant polished diamonds.When most men consider purchasing a diamond engagement ring, they automatically picture a colourless diamond, and rightly so. Colourless diamonds are the most popular and perhaps most desirable of all diamonds, but they aren’t the only stones available. Diamonds occur in a variety of different colours that can be extremely appealing to many women.

So, why if they are so fabulous, haven’t you heard much about them? Could it be they are just a fad? Let’s find out.

 

The Truth About Coloured Diamond Rings

  • They are Rare- One of the main reasons coloured diamond engagement rings are unique and not generally seen is due to the fact that they are actually rather rare. Now, there are stones which are enhanced artificially, but that’s not what we’re discussing.
  • They Come in Various Colours- Coloured diamonds can be found in a variety of colours, including blues, greens, blacks, purples, and yellows. The rarest diamond colour is pink, and is only found in the Australian Argyle diamond mine, which is a mine that produces all but 5% of the diamonds in the world. Regardless of their colour, these diamonds are made by forming near mineral deposits. The type of deposit and the position of the deposit determines the colour of the diamond.
  • Their Use is Affected by Prejudice- While these diamonds are beautiful, especially when used in engagement rings, many individuals are not keen on them. This is because they have been taught that white, or more appropriately, colourless diamonds are the best. While colourless diamonds are indeed beautiful, it never hurts to add a bit of colour to your world.
  • Some Coloured Diamonds Didn’t Start Out Beautiful- Because diamonds that have colour are generally more expensive and rare, many individuals use colour enhancement to bring out the colour, or change the colour, of their diamonds. This process is risky to the diamond, however, and some diamonds cannot be enhanced.

While fashion trends do tell us whether or not wearing coloured diamonds is ‘in style,’ these beautiful diamonds should not be considered a fad. Rather, they are unique gems that are part of the vast and beautiful diamond family.

If you are thinking of purchasing a diamond, don’t let the latest fads or trends be a part of your diamond decision. Whether you are looking for a colourless stone or something a bit unique, it’s a highly personal decision. If you are unsure, the traditional, colourless diamond in a round cut is by far the most brilliant of all. You can’t go wrong with that one.

Treatments That Can Change Diamond Colours

8179-8181 copyWhen you purchase a white diamond ring, one of the factors that affects its value is its colour. The whiter the diamond, or the more colourless it is, the greater its value will be. The whitest diamonds allow a greater amount of light to pass through for a better sparkle and shine. These diamonds are rare, unlike diamonds with brownish or yellowish tones.

 

Fancy coloured diamonds are also extremely rare and expensive, but are not colourless. Instead, these diamonds are at the other end of the spectrum. Their value actually increases with their colour, which can range from bright yellow to blue to green.

 

The diamonds for your engagement rings are rated on an alphabetical scale, with D being the highest rating a white diamond can receive. The most expensive white diamonds are generally rated D, E, or F, while those with traces of brown or yellow in them are rated farther down the alphabetical scale, all the way to Z.

 

Because colourless diamonds are much more valuable, the jewellery industry has created a few methods for turning those lower scale diamonds into ones that are slightly more fancy. While some of these methods have been around for quite some time, others have only recently been developed.

 

Diamond Treatments

 

Colour Tricks and Coatings

 

Sometimes, the diamonds in your engagement rings may be covered with a coating that makes it difficult to see yellow traces in the diamond. This coating is applied with heat, but will eventually wear off over time.

 

Coloured dots of blue or purple ink can be painted onto diamonds to reduce the amount of yellow you are able to see. These dots are generally placed in areas that are obscured by the engagement ring setting, and are not permanent; they can generally be removed with cleaning solutions and water.

 

These diamond treatments are often not revealed to buyers before they make a purchase and are often used to deceive them.

 

Irradiation and High Heat

 

Sometimes jewellers turn ho-hum diamonds into fancy coloured diamonds through the use of irradiation, or exposing the diamond to radiation, and high heat. Most often, if the diamond isn’t exposed to high heat again during its life, the diamond will remain the fancy colour.

 

This trick generally isn’t used to deceive customers, but instead to allow those who can’t afford the price tag on fancy coloured engagement rings in NZ the opportunity to have a beautiful coloured diamond. However, those who purchase this kind of diamond need to understand that it is not a natural fancy coloured diamond and is not an investment.

 

High Pressure High Temperature (HPHT)

 

This controversial way of changing the colour of the diamonds in your engagement rings in NZ isn’t new, but the way the process is being used is. When this technique, which is similar to irradiation and high temperature treatments was first used to turn diamonds with yellow traces into fancy coloured ones, it is now capable of turning browning diamonds into colourless and expensive diamonds.

 

Steps are continually being taken to ensure that every buyer of engagement rings receives full disclosure about their diamonds and is not tricked into purchasing a diamond that has been artificially altered. The diamonds that are altered now must be laser inscribed with “irradiated” or “HPHT processed” or the name of a registered user in order to actually be graded.

 

 

While you may have thought a diamond was simply a diamond, when you purchase an engagement ring in NZ, you need to understand that some diamonds are altered to increase their value. Make sure you obtain full disclosure on your diamond ring so you can be sure you are buying the right one.

Precious Stones for Your Engagement Ring?

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Using Precious Stones With Your Engagement Ring

There are four different precious stones available in the world. The first is the diamond, and it is the most popular option for diamond engagement rings. However, there are three others that can provide additional elegance and charm to your engagement setting. These precious stones are scarce, are hard and durable like diamonds, and have a rich colour your fiancée will love.

Why would you consider adding other precious stones to the same setting as your diamond? Let’s take a look at a few reasons this might be the right option for you.

  • Style – Precious gems like sapphires, rubies, and emeralds have just as much style as diamonds, and, just like Diamond rings, are available in a variety of colours. The deep, rich red of a ruby, the green of an emerald or the lovely blue of a sapphire can truly enhance your engagement ring. These precious stones are available in a wide range of beautiful cuts and can be set around your diamond.
  • Personality – Want to get a ring that matches the personality and unique sense of style of your partner? Precious stones can provide all the colour, style, and beauty your partner deserves and needs to match there personality.
  • Sentimental Value – Is Ruby the birthstone of the month the two of you first met? Maybe an Emerald reminds you of the green of there eyes. Maybe a Sapphire was there father’s birthstone and he is no longer with the family. You know they’d love for him to walk them down the aisle, but you are also aware that will never happen. A couple of carefully placed sapphires in the setting would show them that you truly take all there thoughts and emotions into consideration. Can you imagine there expression as you explain the meaning behind the precious stones?

The possibilities are truly only limited by your imagination when including precious stones in your engagement setting. While diamonds are the traditional choice for engagement rings, they don’t always have to be. Your ring can be as unique as your relationship.