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Tag Archives: 4Cs


    Diamonds are much treasured and have a very important place in the gemological history of the world.  Battles have been fought over them, human beings have killed and died for them.  They have been used as love tokens for centuries, and as a method of exquisite adornment.

    The word 'diamond' is derived from the Ancient Greek word 'adamas' meaning unalterable and unbreakable.  The very first diamonds were discovered as alluvial deposits in India, along the Godovari, Penner and Kirisha ivers.  It is possible that diamonds have been accessible in India for up to 6000 years.  The formation of a diamond deep within the earth requires very specific conditions - exposure of materials containing carbon to extremely high pressure and at considerable depth.

    Diamonds as Adornment                                                                                    The use of diamonds as gems for adornment dates back to antiquity.  The 20th Century has seen a raised interest in this fabulous mineral, primarily because of it's expensive appearance when set in precious metals.  The diamonds characteristics mean that the dispersal of white light throughout the stone results in scintillation and spectacular colours.  No other gem can display these characteristics in this way.

    Experts in gemology have now devised a method of grading diamonds using certain comparable characteristics.  The four most important ones are knows as the 4Cs, which stands for cut, colour, clarity and carat.

    These grading methods are carried out by globally recognised laboratories such as GIA and HRD.  It is recognised that the diamond is the hardest substance known to man.  Because of this characteristic,it is particularly suited to use as gemstones.  Many engagement rings or wedding rings must stand up to daily use and all the wear and tear that brings.

    Coloured Diamonds                                                                                           Although our first thought of colour when considering a diamond will probably be white or clear, there are beautiful ranges of fancy coloured diamonds.  These begin at the yellow, pink and red spectrum, through blue and green, purple, brown and the very popular and fashionable black.  These colours are caused by impurities within the stone - nitrogen for yellow and brown, boron for blue, and for black, carbon inclusions.

    Blood Diamonds                                                                                               Over time, these precious gems have unfortunately been bought and sold to raise funds to finance wars.  In areas of Africa it has been documented that some military factions have taken over complete mines and forced the workers there to continue supplying them with diamonds, so that they can be sold on the black market.  The money raised is then used to purchase weapons and fund military coups.

    A Rising Star in the Diamond Firmament                                                       When choosing your diamond for your engagement ring, you should ensure that you purchase it from a reputable diamond retailer/wholesaler such as MY Diamonds.  Call them now on 1300 66 55 20 and speak with a professional diamond specialist for the diamond of your dreams.



    After much deliberation and changes of heart as to whether to sell its mining interests or to float them on the Stock Exchange, Global miner Rio Tinto has decided not to sell its diamond mining interests in Australia, Canada and Zimbabwe. After discovering that the long-term view for the diamond market is very positive, the company says it will continue as owner and operative.  They say this has been guided by an upturn in demand from Asia for high-end luxury products.  North America has also been pinpointed as a source of very high demand.

    After strong interest from Dominion Diamond Corporation, Petra Diamonds and De Beers, Alan Davies, Rio Tinto Diamonds and Minerals C/O said the company's diamonds businesses were well-positioned to capitalise on the positive market outlook.

    "After considering a number of alternative strategic ownership options, it is clear the best path to generate maximum value for our shareholders is to retain these businesses," Mr Davies said.

    Analyst, David Lennox said the announcement that Rio Tinto had taken its diamond interests off the market was a fairly clear indication that they had not achieved the price they were looking for. Lennox said, "They weren't a keen seller, but had they got the price they wanted it would have been sold. They've certainly done all they can to ensure that production stays in line, it's just that it is getting more costly and they're not getting significant finds of valuable diamonds," he said.

    Argyle produces around 90 per cent of the world's supply of rare pink diamonds and is the world's largest supplier of natural coloured diamonds.

  • Most Expensive Diamonds ~ No.2 ~ The Sancy Diamond

    At No. 2 of the World's Most Expensive Diamonds is the Sancy Diamond, a gem so valuable that its monetry value is un-estimated.   A beautiful pale yellow diamond of 55.23 carats (11.05 grams), the cut of the diamond is unorthodox by Western standards, and is thought to have been of Indian origin, discovered in the 1400s in the Golconda region.

    The stone comprises two back to back crowns ( a cut expected in a regular cut diamond) yet has no pavilion (the lower portion of a stone below it's mid section).

    The Sancy's known history began in 1570 and belonged to Charles the Bold, Duke of Burgundy. In 1495, the stone passed to Charles' cousin, King Manuel I of Portugal after Charles' death.

    D. Antonio, Prior of Crato fled Portugal with the bulk of the country's Crown Jewels after the threat of Spanish rule and was said to have sold the diamond to Nicolas de Harlay, Seigneur de Sancy.

    Henry III and Henry IV of France borrowed the diamond, the later king to secure finance for his armies.  Legend has it that a messenger carrying the jewel never reached his destination, but de Sancy (by then Superintendent of Finance) was convinced the man was loyal, had a search conducted until the site of the messenger's robbery and murder was found. When the body was disinterred, the jewel was found in the messenger's stomach.

    The Sancy diamond was later sold to James I in 1605.  This is when it's thought the diamond was given its current name.  The diamond remained in England until 1669, owned briefly by Charles I, and then passed to his third son, James II.

    This king who became destitute, sold the Sancy to Cardinal Mazarin of France who bequeathed the diamond to the King.

    The whereabouts of the Sancy is unknown after the French revolution until 1828 when it was purchased by Prince Demidoff.  It remained in his family until 1865, when it was sold to Sir Jamsetjee Jeejeebhoy.  He sold it a year later and again it's whereabouts was a mystery until it reappeared in 1867 at the Paris Exposition.

    The Sancy was purchased in 1906 by William Waldorf Astor, who then sold it to the Louvre in 1978.  The Sancy Diamond now rests in the Apollo Gallery, after a very tumultuous history.   It remains one of the most beautiful and coveted diamonds in the world.

  • Top Ten Most Expensive Diamonds - No. 10 'The Allnatt Diamond'

    Today, we start our count down of the world's top ten most expensive diamonds.  Women love diamonds - fact.  And diamonds are ageless.  It doesn't matter whether you're a young woman just about to choose your precious diamond engagement ring, or a mature lady who has collected diamond jewellery - engagement ring, diamond wedding band, diamond earrings and diamond pendents over the years.  Diamonds are still the gem of choice for most of us - and why wouldn't they be?

    Diamonds have been chosen to represent love for centuries, but we mustn't forget that they're also a top investment.  Only recently, the news is that the value of diamonds will increase rapidly over the next few years, so diamonds are truly a 'beautiful investment.'

    Here is Number 10 in our top ten most expensive diamonds in the world - the Allnatt Diamond worth $3 million.

    This superb cushion cut diamond is known as the Allnatt Diamond.  a vivid yellow fancy coloured diamond, it weighs 20.258 grams with 101.29 carats.

    Some believe this stunning diamond was discovered in the De Beers Premier Diamond Mine and purchased by a Major Alfred Ernest Allnatt - a sportsman, art patron and benefactor.  The diamond was resold in 1996 by Christie's in Geneva for $3,043,496.

    After being sold to the SIBA Corporation, the diamond was cut to its current weight, intensifying its vivid colour.

    The Allnatt was displayed as part of the Smithsonian's                     "The Splendour of Diamonds" exhibit.

    Next time:~ The Moussaieff Red Diamond

  • Diamond Portfolio Sale in Singapore ~ Diamonds A Solid Investment

    Marilyn Monroe sang, 'Diamonds are a girls best friend' and it would seem that she was absolutely right all those years ago.  The value of diamonds is set to rocket if you believe Shlomo Tidhar, the CEO of SDX, the Singapore Diamond Exchange. It has been reported on the BBC'S Asia Business Report that diamonds are a solid investment. They say:~

    "Throughout the world, diamonds are widely recognised as symbols of distinguished status. As global economies evolve and portfolios diversify, these precious gems have come to be considered as an alternative investment asset class.

    In the past decade, polished diamonds have witnessed growing consumer demand, predominantly from China, India and Russia. At the same time, global rough diamond supplies are contracting. These two opposing forces are leading to continued long-term price increases of diamonds of all sizes.

    At Singapore Diamond Exchange, we have developed a uniquely different approach to helping you source and manage these precious assets. Drawing on our collective expertise and strategic alliances, we offer a unique opportunity to invest in diamonds at wholesale prices as an alternative investment asset class for medium to long-term periods."

    All of this will be fantastic news for those of us who have always considered diamonds to be a real investment.  Many diamond portfolios are being sold due to the downturn and although recently the price of a diamond has decreased, there is a sign that diamond prices will hold their own and indeed, increase in price.

    At My Diamonds we have always held the view that the diamond is the most beautiful and unique investment you can buy.  But a diamond should not just be seen as an investment.  We carry a scintillating, breath taking collection of diamonds, either loose diamonds to be made in to stunning engagement rings, or in pre-designed jewellery, crafted by our in-house artisan jeweller.  By all means purchase diamonds as an investment, but for wedding rings, wedding bands, diamond engagement rings and diamond gifts, they are very difficult to beat.  Their sparkle and flash of brilliance will remind you just how beautiful they really are.  A diamond says 'forever'.

  • The CARAT WEIGHT of your Diamond

    Our recent posts have covered the 4Cs - the grading standard that diamond grading laboratories such as GIA and HRD use when examining and grading diamonds.

    As a reminder - when purchasing a diamond from My Diamonds you will receive a diamond grading certificate such as the one shown below:~

    The certificate covers the 4Cs of diamond grading as we have explained, but will also give you unique information about your diamond.

    We have talked about COLOUR, CUT and CLARITY.  This post is about the last of the 4Cs - CARAT WEIGHT.

    CARAT WEIGHT ~ a carat is the unit of measurement specifically used to determine and describe the weight of a diamond or other precious stone.  The word 'carat' originates from the carob seed, a seed with a uniformity of weight that diamond traders in the past used to use as a counterbalance when weighing gems.

    A single carat is the equivalent of 0.2 grams, and divided into 100 points.  A diamond grading report will measure the weight of a diamond to the nearest 100th of a carat e.g. a 1 carat diamond has 100 points where as a quarter carat stone has 25 points.  In pre-set jewellery diamond weight is divided into fractions and will be graded with their decimal equivalent.  Below is a carat weight grading chart:~

    Many people think that the weight of the diamond is the 'C' that determines value.  This is not so.  If a diamond is of very high quality i.e. the colour, clarity and finish is exemplary then it will be worth more per carat weight.  All of these factors must be taken in to consideration, and an experienced diamond retailer such as My Diamonds, one of Australia's foremost diamond retailers, will guide you to your perfect diamond.

  • The 4Cs - The CUT of Your Diamond

    We began the 4Cs in our last post, looking at the grading of colour within a diamond.  This post is another of the 4Cs ~ the Cut, possibly the most overlooked of the 4Cs.

    The diamond cut refers to the angles and proportions of the rough stone, when it's placed into the hands of an expert diamond cutter.  He will take the rough stone and examine it from all angles, determining the cut that will suit the natural stone - looking for the most fire and scintillation.  The diamond cut is the only one of the 4Cs not naturally present when the mineral is hewn from diamond mines or recovered from alluvial deposits.

    An experienced diamond cutter such as the artisan master craftsman at My Diamonds will enhance the stone ~ looking at how natural light reflects and sparkles in the natural form.  The cutter will then cut the stone to the shape he has chosen, polishing the usual 58 facets until they gleam.  These tiny facets are the table, crown, pavilion, girdle and the culet, - the pointed end of the diamond that sits in the appropriate mount.
    For a purchaser of a diamond, these terms will not be familiar to you. You will judge your diamond on the fire emitting from the stone - the brilliance as you turn it this way and that.  The only time you will consider the cut of the diamond is when you receive your GIA or HRD grading report from My Diamonds.  Because My Diamonds diamonds are sourced from reliable diamond merchants and are of an extremely high quality, each diamond, whether loose or in a         pre-designed diamond engagement ring will be accompanied by a diamond grading report.  It is on this report you will have the true value and quality of your diamond.

    The absolute beauty and stunning scintillation of your diamond will be on her hand, where it will be a reminder of everlasting love.

  • Certified Diamonds. Why So Important?

    Although you may think the contrary, buying diamonds online is the best way to purchase your dream diamond engagement ring.  You may be wondering why.

    The answer is that all diamonds offered on line are certified.  When you go to your local mall it's quite possible many of the diamonds you see have not been certified by a gemmologist or diamond grading laboratory.  Yes,those little beauties sparkle and scintillate in the mall lights, but do you actually know anything about the diamond in your diamond engagement ring - the cut, the colour, the clarity and the carat weight - commonly known in the diamond industry as the 4Cs of gemmology.  My Diamonds, a renowned and trusted diamond retailer in Australia, offer their customers only diamonds that have gone though the certification process with GIA orHRD, diamond grading laboratories.

    This part of the diamond purchasing process is so important that My Diamonds assert in their Diamond Knowledge base, that you should always expect to receive a grading certificate with your diamond, whether a loose diamond for a custom design or a diamond mounted in a pre designed diamond engagement ring.

    The 4Cs will tell you most of the points you need to know when purchasing your engagement ring.  The cut, for example will be graded on the skill of the diamond cutter, not the shape of the diamond- the colour will be graded from accepted diamond colour grades as shown below:~

    - the clarity will be graded by the nature of the diamond:

    - the cut grade:~

    - and of course, the carat weight:~

    This is essential knowledge when buying your dream diamond.  We'll cover the 4Cs in more detail in our next posts.  Enjoy you diamond!

  • The Exciting World of Loose Diamonds

    Most diamond retailers carry pre-designed rings, diamond engagement rings, diamond wedding bands and diamond jewellery in their collections.  One of the most exciting experiences is to choose your own centre stone for your diamond engagement ring - so you can truly say you chose your perfect diamond!

    At My Diamonds we have an extensive collection of loose diamonds to fulfil your dreams.  Choose from round, princess, emerald, cushion, pear, marquise, asscher, oval, radiant, heart and trilliant.  Each exquisite stone will have been graded by a diamond grading laboratory, usually GIA,  and will receive a diamond grading document:~

    This dossier will cover the 4Cs of diamond grading, a subject we will cover in more detail on this blog.  The 4Cs are part of the diamond education information included on the My Diamonds website.  It is imperative that any diamond purchaser familiarises themselves with the grading system so that the diamond you thought you purchased is the one you receive.  At My Diamonds our diamond grading is exemplary and we have total confidence in the high quality of our stones.

    Go to the My Diamonds website at and explore our extensive collection of loose diamonds.  We're sure you will find a diamond to excite you.

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