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The Letseng mine in the small Kingdom of Lesotho, South Africa has just uncovered another massive diamond rough: a 198-carat stone, roughly the size of a large strawberry.
A diamond over 100 carats is rare enough – with only about 10 to 15 found each year worldwide – but a rough that is nearly 200 carats is an exceedingly rare find. A stone of this size is expected to yield a polished diamond around 100 carats, or half the weight of the rough it originated from.
Even though the stone’s size is impressive, it is not even close to being the largest ever uncovered from the Letseng mine. In fact, the Letseng mine is well-known for churning out large, quality rough over the years, and has the highest price per carat production of all the mines in the world. Some of the largest include the Lesotho Promise, the 15th largest diamond in the world at 603 carats; the Letseng Legacy at 493 carats, and the Leseli La Letseng at 478 carats which are 18th and 20th largest respectively.
What makes this rough even more valuable is its’ designation of Type IIa, which constitutes less than 2% of all natural diamonds. Type IIa diamonds have no measurable nitrogen impurities, making them chemically pure. This not only gives them exceptional optical transparency, but also a high likelihood of achieving a colorless (D-E-F) grade and a high clarity grade. Officials from Gem Diamonds Ltd, which own the majority stake in the Letseng mine, confirmed this after inspection of the stone noting it as “an exceptional white, high-quality diamond that displays no fluorescence”.
Martin Potts, a London-based mining analyst has estimated the 198 carat stone to fetch somewhere between $12 to $15 million.
Tags: carat, clarity, colorless, cut, diamonds, Gem Diamonds, Golconda, impurities, kimberlite, largest, Lesotho, Lesotho Promise, Letseng Legacy, Letseng mine, mining, pipes, polished, price per carat, raw diamond, rough diamond, sattelite, South Africa, Type II, Type IIa
The world has set a new record never before has a ring being entirely made of a single diamond. How did they do it? Who had this crazy idea? How many carats is it and the big question is how much does it cost and who will buy it? They say diamonds are a girl’s best friend; well this one ought to provide a lifelong companionship.
The 150 carat all diamond ring was made with laser technology. Multiple tests were done to get the precision of the circle right. Special laser equipment was bought to cut the diamond directly and not alter the colour of it. It was made by a labor of love and took a couple years in the process for making it. Mohamed Shawesh, president and CEO of Geneva-based Shawish Jewelry was the genius and passion behind this stunning piece. “A ring made entirely of a faceted diamond has always seemed like a fantasy, It seemed impossible, so we decided to embark on the adventure of creating it. To create the perfect diamond ring is the epitome of art.” Says Mohamed Shawesh. It had been a dream of his from way back. In 2009 he sought to get the copyright to design the ring and in 2010 it was finalized but it still had a lot more time to go.
They had to go through a lengthy process of designs to get the ring to its perfect precision. Shawish speaks of this, “We had to do multiple tests with the design, to get the precision of the circle right. Diamonds are made of carbon and molecules that can change, even the colour can be altered when attempting to cut it. We had to buy special laser equipment, to cut directly into the diamond. The most important aspect is preserving the integrity of the diamond and of course the most difficult phase is precision cutting an entire stone into a ring.”
A couple years later in 2012 all the dreaming, fantasizing, and hard work has paid off. The 150 carat ring now goes for about $70 million.
Tags: carat ring, cut, diamond ring, diamonds, faceted diamond, fantasizing, genius, jewel, jewely, labor of love, laser equipment, laser technology, perfect, size, stone, stunning piece
A treasure that was uncovered 100 years ago by a workman is going to now be on display for the first time next fall in the Museum of London. The entire chest called the Cheapside Hoard which includes hundreds of gold and gem studded Tudor and Jacobean jewellery. There are many questions and possible murder mystery tales surrounding this jewellery which makes its value more than just its weight in gold. It also can tell us about the life during this time in London a period from between 1558 to 1625. Some questions that arise are whose jewels were these? Why was it hidden? Why hasn’t it ever been claimed?
It was first discovered in 1912 when it was buried in a cellar on Cheapside in the City of London. A workman’s pickaxe smashed through the brick floor more than a century ago and it was left forgotten. When an old house was being demolished on Cheapside the hoard was found and remains priceless.
“Nothing in the world comes close,” said Museum of London curator Hazel Forsyth. He has been studying the pieces for a long time now. Some of the jewelry includes necklaces, rings, brooches, chains, pearls, rubies, fan holders, scent bottles and two carved gems dating back 1,300 years ago. The most delicate of items are fine gold enamel chains with gems on them up to two meters long they were stitched on gowns and hung from collar to waist as a dazzling display. “This collection has been misunderstood and misinterpreted, dismissed as jewelry for the merchant classes,” Forsyth said. “But at this date the merchants were among the wealthiest people in the land; they had far more disposable wealth than the aristocracy.” Along with the massive rubies, and pearls the size of acorns there are sapphires, emeralds and some fake stones made of quartz crystal which have been dyed and carved to look like precious gems.
New research of a specific gem known as “The Stafford Intaglio”, an oval shaped piece of engraved cornelian, suggest the time it was buried between 1640 and 1666. The engraved piece is a badge of Stafford with a swan and a wreath, there was only one Viscount Stafford by the name of William Howard in 1640.
Two other pieces from the Cheapside Hoard is a salamander shaped brooch set with Colombian emeralds and table cut diamonds from India. The other is a gold enamel ring set with moonstone and engraved with a frog.
Another extremely rare piece is a hexagonal emerald watch, one of the most unusual and decadent pieces found, one of a kind no other in its era had ever been recorded.
All these jewels will be displayed together they are the single most important knowledge of early modern jewelry worldwide.
Tags: brooch, city of london, cornelian, cut, diamond, gold, gold enamel, hazel forsyth, intaglio, jewel, museum of london, mystery tales, necklace, pearls, precious gems, quartz, quartz crystal, rare, ring, rubies, sapphire, shape, stone, tudor and jacobean jewellery
Here we will only consider diamonds. If you are considering other stones, speak to a gemmologist to find out your options and get their recommendations. Remember: knowledge is power, know as much as you can about what you are spending your money on.
Diamonds are rocks that form naturally in the earth, so there is no ‘one size fits all’. It is like choosing between apples – size, sweetness, crispness, juiciness are categories you want to balance when picking an apple. It is similar for diamonds but with different criteria.
- Carat: In gold this word refers to the purity, with diamonds it is the weight/size. Bear in mind that diamonds are priced per carat digitally. In other words 0.5-0.99 is one price bracket, and 1.00-1.49 is another. Therefore it is possible to buy a 0.98 for the price of a 0.5 and it will look like a 1 carat. The other factors are also critical, however, so bear in mind that a 1 carat diamond can vary in price dramatically depending on the other variables.
- Clarity: Being an organic material, most diamonds have impurities known as inclusions. Inclusions are usually white or black and some can be seen with the naked eye. A stone without inclusions is called ‘flawless’ and carries a high price tag. Clarity is graded using letter-number combinations. For most rings the range to look for is either VS1 and VS2 which are very clear, then S1 and S2 have inclusions that can easily be seen with 10x magnification, but not so easily with the naked eye. Diamonds also possess blemishes such as tiny cracks which can make the diamond cloudy (see warnings below).
- Colour: diamonds vary in colour from colourless to brown and even black. Unless you are after a diamond that is noticeably coloured, you want to aim for as white as possible. Colour is graded using letters. D is colourless, through to zyx (noticeably tinted). Aim for D-G range for a quality diamond.
- Cut: this determines the overall shape of the stone (round, square, rectangle, oval, pear shaped etc) and sparkly (fire). The more facets the more the light is bounced around in the stone and is reflected back to you as sparkle. Round brilliant cut is the most popular and gives a lot of sparkle. Also more facets can hide impurities, for example, if you are in the market for a flawless diamond, this will be well seen in an emerald (rectangle) cut.
Speak to a jeweler who knows their stones. If your priority is high purity, then maybe you can go down on the carat size or colour etc.
Not enough emphasis can be made on the importance of buying from a reputable retailer. It is really important that you trust who you are buying from as not all jewelry is what it seems.
- Castings of the ring mounts when machine made can be porous (tiny bubbles in the metal); the claws that set the stones can be loose, and these rings will not last.
- There are imitation diamonds on the market, so be sure to get a certification so that you know you are not buying a cubic zirconia or moissanite when you want a diamond.
- Especially when buying jewelry unseen, such as on the internet, be aware that even if the dealer is obliged to state colour, clarity and carat value, it is not obliged to state cloudiness or treatments that have been made to artificially enhance the stone. These include laser drilling where tiny pin holes are made into the inclusion to bleach it white or dissolve it. These can look like natural flaws and don’t necessarily impair the appearance or structure of the stone. Fillers, however are not considered permanent and the substance used (usually glass) has different properties to diamonds and can appear as colour flashes unusual to diamond. Also, heat and sunlight can effect this substance over time darkening or eroding it. Even though diamond is the hardest substance, cracks (especially unfilled) are weaknesses and make the stone vulnerable to cracking. There is nothing wrong with buying a treated stone (it can make a lesser quality stone appear better), but make sure that this is disclosed when you purchase so that you know you are paying the right price.
You are now armed and ready to browse those jewelry stores and know what you are looking at! This is all very technical information, as you browse you will find that some diamonds “speak” to you more than others. Don’t be held down by the numbers – find a stone you love and a setting that compliments the stone and your personality. And shop around for the jeweler you trust.
Tags: 1 carat diamond, bear in mind, blemishes, clarity, colour, cubic, cut, diamond, diamond treatments, digitally, engagement ring, gemmologist, gold, how to pick a diamond, impurities, inclusions, knowledge is power, magnification, moissanite, naked eye, number combinations, organic material, platinum, price bracket, price tag, quality diamond, rectangle, ring, silver, solitaire, sweetness, tiny cracks, vs1, vs2, zirconia