Stunning Selection Of Black Diamond Jewellery & Emerald Ring

Sale no: 176343

Sale closed

Stunning Selection Of Black Diamond Jewellery & Emerald Ring
Sale type
Online Delivery
Start time
30/04/2010 5.00 PM AEST
04/05/2010 9.30 PM AEST
Deliver to
Nationwide Delivery
Buyers premium
Sales Support
GraysOnline Help Centre
Under instructions from
M K Handcrafted Jewellery

This auction has now closed. If you are interested in similar sales, click here.

Catalogue and Bidding available from 30/04/2010 5.00 PM AEST

Why Diamonds

The reasons for buying a diamond are as diverse as the people who desire them.

  • Diamonds are beautiful. Formed millions of years ago, they have stood the test of time with a fire and brilliance that is unquenchable. They create an aura of success and inspire feelings of pride.
  • Diamonds are durable. A diamond is the hardest substance known. They resist deterioration and you can be confident that the diamond you buy today will still shine as brilliantly when your great-grandchildren wear it.
  • Diamonds are rare. For every carat of rough diamonds recovered, more than 250 tonnes of ore have to be blasted, crushed and processed. Only 20% will be gemquality.


The cut of a diamond determines its brilliance. There is no single measurement of a diamond that defines its cut, but rather a collection of measurements and observations that determine the relationship between a diamonds light performance, dimensions and finish. Most gemologists consider cut the most important diamond characteristic because even if a diamond has perfect color and clarity, a diamond with a poor cut will have dulled brilliance. The width and depth can have an effect on how light travels within the diamond, and how it exits in the form of brilliance.  

  • Too Shallow: Light is lost out the bottom causing the diamond to lose brilliance.
  • Too Deep: Light escapes out the sides causing the diamond to appear dark and dull.


Clarity: Diamonds were formed millions of years ago, deep within the earth under enormous heat and pressure.Consequently, most diamonds contain tiny marks, known as inclusions, which make each stone unique. The inclusions don’t necessarily weaken the stone and when they don’t interfere with the passage of light they do not affect its beauty. The fewer and smaller the inclusions, the more valuable a diamond will be.


Colour: Most gem diamonds seen alone appear white, but most have a hint of colour, mainly yellow. Diamonds with no trace of colour at all are extremely rare and the closer they are to no colour,the more rare and valuable they will be. Also rare are diamonds with a strong pure colour that are called “fancies” and which are very valuable. The Argyle Mine in Australia, which is the world’s biggest diamond mine, produces the rare pink diamonds as well as beautiful cognac and champagne coloured diamonds.

Acting as a prism, a diamond can divide light into a spectrum of colors and reflect this light as colorful flashes called fire. Just as when looking through colored glass, color in a diamond will act as a filter, and will diminish the spectrum of color emitted. The less color in a diamond, the more colorful the fire, and the better the color grade.


The size of a diamond has the biggest impact on its price. The metric carat, which equals 0.20 gram, is the standard unit of weight for diamonds and most other gems. If other factors are equal, the more a stone weighs, the more valuable it will be. Gemological laboratories measure carat weight when the diamond is loose (unmounted). While it is possible to estimate the weight of a mounted diamond, the lab uses ultrasensitive scales to achieve an exact weight, measured 3 decimal places, although the third decimal place is not usually mentioned at the retail level.

Here are several ways to express 1 carat: 1 ct. 200 milligrams 1/5 gram 100 points

 When diamonds are mined, large gems are discovered much less frequently than small ones, which makes large diamonds much more valuable. In fact, diamond prices rise exponentially with carat weight. So, a 2-carat diamond of a given quality is always worth more than two 1-carat diamonds of the same quality.

Diamond Anatomy

  • Diameter: The width of the diamond as measured through the girdle.
  • Table: The largest facet of a gemstone.
  • Crown: The top portion of a diamond extending from the girdle to the table.
  • Girdle: The intersection of the crown and pavilion which defines the perimeter of the diamond.
  • Pavilion: The bottom portion of a diamond, extending from the girdle to the culet.
  • Culet: The facet at the tip of a gemstone. The preferred culet is not visible with the unaided eye (graded "none" or "small").
  • Depth: The height of a gemstone measured from the culet to the table.

Polish & Symmetry

Polish and symmetry are two important aspects of the cutting process. The polish grade describes the smoothness of the diamonds facets, and the symmetry grade refers to alignment of the facets. With poor polish, the surface of a facet can be dulled, and may create blurred or dulled sparkle. With poor symmetry, light can be misdirected as it enters and exits the diamond. For the most beautiful diamond, look for a symmetry grade of ideal (ID), excellent (EX), very good (VG), or good (G). Avoid diamonds with symmetry grades of fair (F) or poor (P), as the alignment of their facets may misdirect light so severely that it affects the brilliance of the diamond.


Some people seek diamonds that produce this unique effect, while others avoid it. The visible effects of fluorescence grades of faint, inert, negligible, and medium, can only be detected by a trained gemologist with specific UV light. A fluorescence grade of strong or very strong can make a diamond with a near-colorless grade look even whiter. In some very rare instances a diamond with very strong fluorescence can give the diamond a slight hazy or oily 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.

Black Diamonds

A black diamond, or Carbonado originated on earth 3.5 billion years ago. Infernal heat and pressure, under the earths surface transformed the carbon atoms into crystals. Black Diamonds are opaque and just like colour-less diamonds, they are of great hardness that amounts to 10 in the Mohss scale of hardness.

Black Diamonds are full of criss-crossing inclusions containing black deposits of Sulphides which are responsible for their opaque texture. Pitting on the stones surface may also be evident and is quite normal.

As a general rule, black diamonds contain a multitude of grey and dark grey elements the combination of which form the black colour.

Diamonds that naturally occur with shades of colour are referred to as "Fancy". Fancy coloured diamonds are valued by the intensity of their colour concentration. All coloured diamonds belong to the carbon family. The difference of the colour is the result of the different molecular structures of the crystals.

Black diamonds are often enhanced and are still genuine diamonds treated with radiation to make their colour appear more black, or to obtain uniform colour.

It is typically much better quality than a "natural" black diamond due to the nature of its inclusions.

In ancient Italy, a black diamond was regarded as the stone of reconciliation. It was believed that touch of black diamond has the power of patching up all misunderstandings between the warring couples.

About Valuations

Each valuation is produced for "Retail Replacement" in the following environment;

  • Traditional Metropolitan retail outlet
  • In the SydneyCBD
  • Based upon Australian material & labour costs.

When a valuer generates a valuation for "Retail Replacement" he is trying to most accurately determine what that item would sell for in the above retail environment. As grading diamonds and precious stones is not an exact art variations do occur.


I purchased a diamond ring for my wifes 50th. Very happy with it, as indeed she is! It is just as illustrated in the pictures and the delivery was prompt. Yes we are satisfied with our purchase.

GD, Campbelltown NSWJacobs Handcrafted Designs

1 carat diamond engagement ring. Had the item delivered within three days of purchase, with genuine valuation certificate.

AM, Bondi Junction NSWTate & Co

I bought my new engagement ring. It was everything I expected it to be and it even fit perfectly.

BS, Kealba VICCastellani

I purchased a beautiful 1.5 carat diamond ring set in white gold. It is a lovely ring and quite a few people have admired it while I have been wearing it. I love Grays Online auctions.

LH, Mount Isa QLDCastellani

I ordered an engagement ring. She reckons its the ducks guts.

SF, Frankston VICJacobs Handcrafted Designs

The items that have been purchased were ear rings and a diamond ring. These were the perfect gift.

ND, Bairnsdale VICTate & Co & Jacobs Handcrafted Designs

Delivery Information

Delivery Terms and Conditions

All freight prices quoted for this sale include packaging, handling and insurance.

All freight prices are charged from the originating warehouse to your delivery postcode and involve one delivery attempt by our nominated courier. If no one is available to meet the courier, Australia Post will leave a card with the address of the Post Office designated for collection. Deliveries need to be collected within five business days. After this, a second reminder card will be delivered to your address. If the goods are not collected in the next five business days, the item will be returned to GraysOnline.

If your item is delivered by Messenger Post and no one is available to meet the courier, a card with Messenger Post contact details will be left for you to make arrangements, for the second delivery attempt.

If the above attempts by Australia Post/ Messenger Post fail and item is returned to GraysOnline, a fee will be charged if re-delivery is required.

It is important that you check the freight charge for your item prior to placing a bid or a sale order by using the Shipping Calculator.

No customer pickups are allowed from the warehouse, unless specified in this Sale Overview as a Pick Up sale.

Delivery Time:

Delivery times can be anywhere between 2 and 10 working days from payment date, depending on your location. Most items are shipped the next day.

We ask you to allow up to 10 working days from the date of payment for the delivery of your goods. You will be sent an email notifying you when your item has left our warehouse.

This email will include the name of the carrier company and the consignment note number of your item, together with online tracking information. Please follow the link to the relevant website, enter your reference number for fast and efficient tracking on the delivery status of your item.

It is important to update your address prior to bidding.

Your goods will be delivered to your registered address. Australia Post parcel delivery standards will apply for regional and country areas, as well as commercial buildings.

Once an auction is closed or an order placed on Buy Now, our fully automated despatch process is activated to ensure fast and efficient delivery of your item. Please therefore accept our apology to decline any request for redirection.

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