Close X Cookies are necessary for the proper functioning of By continuing your navigation on our website, you are accepting the use of cookies.
To learn more about cookies ...
In the same category

The Star of Sierra Leone

IMG Auteur
From the Archives : Originally published July 10th, 2009
342 words - Reading time : 0 - 1 minutes
( 3 votes, 4.3/5 )
Print article
  Article Comments Comment this article Rating All Articles  
Our Newsletter...
FOLLOW : Diamond
Category : Coins and treasures





The Star of Sierra Leone, a magnificent 969-carat diamond, was discovered in the Koidu area on February 14, 1972 at the Diminco Mine. It ranks as the third-largest gem-quality diamond and the largest alluvial diamond ever discovered. The Star of Sierra Leone is considered as the most famous diamond unearthed from this place. The largest gem-quality diamond discovered previously in Sierra Leone was the 620-carat "Sefadu" diamond, found in 1970.


24hGold - The Star of Sierra L...



The diamond is a colorless, lustrous and pellucid crystal, features that are so characteristic of the exceptional quality colorless diamonds found in the country. The name Star of Sierra Leone appears to have been inspired by the lustrous nature of this enormous crystal.


The rough diamond was an enormous colorless and transparent crystal, which was subsequently cut into 17 stones, 13 of which were flawless and “top-color”.

The largest stone that was cut from the diamond was initially cut into an emerald shaped stone weighing 143.2, but was flawed. To eliminate the flaws the stone had to be re-cut again, with a drastic reduction in weight, resulting finally in a pear-shaped, colorless, and flawless, 53.96 carat diamond.


24hGold - The Star of Sierra L...


Diamonds of Sierra Leone have an international reputation as one of the highest gem quality diamonds in the world. The diamonds are so pure and free of inclusions that some of them are known as "glasses", clear, transparent and absolutely colorless. Being D-color diamonds, the Star of Sierra Leone diamonds are Type IIa diamonds, that are characterized as chemically pure (due the absence of impurities such as nitrogen, boron, hydrogen etc. which can cause color in diamonds) and structurally perfect (due to the absence of plastic distortions in the crystal, which can also impart rare fancy colors to the diamond) .


On October 3, 1972, Sierra Leone's then-President, Siaka Stevens, announced that Harry Winston, the New York City jeweller, had purchased the Star of Sierra Leone for under $2.5 million.


Six of the "Star of Sierra Leone" diamonds were later set by Harry Winston in the famous "Star of Sierra Leone" brooch.



All famous diamonds 




<< Previous article
Rate : Average :4.3 (3 votes)
>> Next article
Latest comment posted for this article
Be the first to comment
Add your comment
Top articles
World PM Newsflow
Mining Company News
Tribune Res.(Ag-Au)TBR.AX
Notice of Annual General Meeting/Proxy Form
AU$ 4.05-1.22%Trend Power :
Corporate news
Black HillsBKH
3:41 am Black Hills Corp raises its FY15 EPS guidance
US$ 43.33-1.23%Trend Power :
Corporate news
Goodrich Petroleum(Ngas-Oil)GDP
Goodrich Petroleum Announces Private Exchange Transactions for Convertible Senior Notes
US$ 0.82+1.23%Trend Power :
Corporate news
Carmanah Tech CorpCMH.TO
Carmanah Releases Preliminary Financial Results for Q3 2015
CA$ 6.01+2.04%Trend Power :
Corporate news
Black HillsBKH
Black Hills Corp. Raises 2015 Earnings Guidance and Announces Analyst Day Presentation Topics
US$ 43.33-1.23%Trend Power :
Corporate news
Impact Silver(Ag-Au-Cu)IPT.V
IMPACT Silver Provides Update on New Capire Mineral Resource Study
CA$ 0.18+16.13%Trend Power :
Corporate news
Bankers Petroleum(Oil)BNK.TO
Edited Transcript of BNK.TO earnings conference call or presentation 7-Oct-15 12:30pm GMT
CA$ 2.44-6.87%Trend Power :
Corporate news
Cheniere Energy(Oil)LNG
LNG Bust Could Last For Years
US$ 53.04-0.47%Trend Power :
Corporate news
Callon PetroleumCPE
4:18 pm Callon Petroleum announces that the borrowing base under its senior secured revolving credit facility was increased by 20% to $300 mln
US$ 8.86-3.90%Trend Power :
Corporate news
Callon PetroleumCPE
Callon Petroleum Company Announces 20% Increase in Borrowing Base
US$ 8.86-3.90%Trend Power :
Corporate news
Comments closed