ArticleNews

Sotheby’s Auction of the Blue Moon Diamond

By 20.09 September 20th, 2018 No Comments

Prior to this auction the Blue Moon Diamond was exhibited under very tight security in Hong Kong, New York and London. Then on Wednesday November 11, 2015 history was made in Geneva with the sale by Sotheby’s of its spectacular star gem, a 12.03 carat, ring-mounted cushion-cut fancy vivid blue diamond called The Blue Moon. The auction record for gemstones was broken when this stone was bought for $48.4 million – the highest price ever paid per carat (over $4 million) – by property tycoon Joseph Lau, Hong Kong’s sixth richest man, to honour his seven-year old daughter, Josephine. He renamed the diamond The Blue Moon of Josephine.

This rare, large, mysterious and magical stone is classified flawless by the Gemological Institute of America and has exceptional clarity and perfect color with the highest possible grading. It was discovered in January 2014 at the Cullinan mine near Pretoria in South Africa which is the world’s best and only reliable source for blue diamonds: this mine generates about 25% or over 400 carats of the world’s blue diamonds per annum. The Cullinan Mine was run for its first eighteen years by the DeBeers Diamond Conglomerate. Currently it is owned by a three-way consortium: Petra Diamonds, Thembinkosi Mining Investments and a Saudi-based investment company, Al Rajhi Holdings. The expectation is that this mine will produce one million carats per annum for the next twenty to forty years!

Occasionally an exceptional Blue Moon diamond surfaces – its rarity is what entices diamond collectors to pay exorbitant prices for this rare gem, hence its name from ‘once in a blue moon’! Rahul Kadakia, international head of Christie’s jewelry, said “the investor appetite continues to grow for the Earth’s rarest objects of natural beauty”.

The original weight of the rough Blue Moon diamond was 29.62 carats. It was cut by the New York 5th Avenue-based Core International after five months of studying the stone, and then three months of highly skilled cutting and polishing the stone to perfection. Thirty exact replica copies were cut first before going ahead with the ultimate challenge of cutting the real rough Blue Moon diamond.

The color was mentioned by the GIA as being indescribable and was likened as being like the ocean. The intensity of color had never been seen before within such a large stone. This in itself placed the Blue Moon Diamond among the most famous gems in the world. David Bennett, the head of Sotheby’s international jewelry division said “For me the Blue Moon was always the blue diamond of my career. I’ve never seen a more beautiful stone – its shape, color and purity. It’s a magical stone”.

 

Clarity

clarity_slider

×
Color

color_slider

×
Carat

The international unit of weight, used for measuring diamonds and gemstones. 1 carat is equal to 200 milligrams, or 0.2 grams.

×
Clarity

clarity_slider

×
Color

color_slider

×
Cut

Nothing is more impactful on a precious stone’s brilliance than its cut. The cut refers to the angles and proportions of a diamond. Known in the industry as ‘fire’, referring to the coloured light reflected, and ‘brilliance’ for the uncoloured light. The cut of a diamond – its form and finish, its depth and width, the uniformity of the facets – determines its beauty. The skill with which a diamond is cut determines how well it reflects and refracts light. A diamond should be cut proportionally, neither very shallow not very deep, given its dimensions. A diamond’s cut is its most important characteristics and a measure of its apparent beauty.

×
Certificate

A diamond certificate or grading report provides an expert opinion on the quality of the diamond and is provided by an independent gemology lab. Trained gemologists with specialized equipment measure the weight and dimensions of the diamond and assess quality characteristics such as cut, color, and clarity. Brilliant Earth diamonds are certified by the world’s leading gem grading labs including GIA, IGI, and GCAL.

×
Depth

The height of a diamond, from the culet to the table referred as a Depth of the diamond . Depth % is the height of the diamond as a percentage of the girdle diameter.

diamond_depth

×
Table

Table referred as the largest facet of a gemstone, located at the top. Table % is the table width as a percentage of the girdle diameter.

diamond_table

×
Polish

Polish refers to the smoothness of the exterior of a diamond. Polish is graded from Ideal, Excellent, Very Good, Good, Fair, or Poor. Polish grades of Good or higher have the least effect on the brilliance of the diamond and recommended by us for the finest quality jewelry.

×
Symmetry

Symmetry refers to the angles to which the facets are aligned. Basically exactness of the shape of a diamond, and the symmetrical arrangement and even placement of the facets. If facets are misaligned, the diamond may poorly reflect light. Symmetry is graded from Excellent, Very Good, Good, Fair, or Poor. We recommends diamonds with Good or higher symmetry grades.

×
Fluorescence

Describes the diamond’s response to ultraviolet light. In diamonds with strong or very strong fluorescence, there may be some interference with the flow of light which causes a milky or oily appearance. Canadian diamonds almost always have none to slight fluorescence.

×
Measurements

Diamonds with “fancy” shapes are measured according to their length, width and depth. These diamonds will have a longer axis (the biggest measurement) and a shorter one that represents their width. The depth indicates the measurement of the diamond from the bottom to the top. The relative proportions of a diamond ultimately affect its quality and value.

Round-shaped diamonds are never perfectly round even though they may seem to be that way when you look at them. There is a tiny variation between maximum and minimum diameter, so dimensions are reflected as measurements of maximum diameter, minimum diameter and depth.

×
Call Now ButtonCall us today
Select your currency
USD United States (US) dollar