Photos show stones from the current lot. Every stone you receive matches the size and grade you choose.
Calibrated · Loose Gemstone
Loose Black Diamond GIA Certified Trillion Cut AAA Quality Available From 7MM- 10MM
Sold per stone. Pick a size and options; the price drops as you add more of the same stone.
- Free US shipping
over $35 - 30-day returns
- Ships to
50+ countries
- Shape
- Trillion
- Quality
- Best
- Treatment
- Treated
Make it into a piece
Settings that fit
Every setting here is made for this exact size. Change the size above and the list changes with it.
Your stone, actual size
Pendant and ring settings
Earring settings
Finish with a chain
All chains-
Venetian Box-Link Chain in Sterling Silver with Spring Ring clasp
From $140.84
-
14K Solid Gold FLEX Herringbone Chain – 2.8mm Wide, 18 Inch Flat Gold Chain, Real Gold Necklace for Women, Italian Herringbone Chain
$1,170.31
-
14K Gold 1 mm Solid Rope Chain
From $47.30
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14K Gold 1.3 mm Cable Chain
From $1,177.70
Every size at actual size
At 100% zoom on a computer screen. Click a size to choose it.
About these stones
GIA Quality Assurance Report is provided for each stone.
Black Diamond Information:
Certification: Certified by GIA - Quality Assurance Report
Number of Diamonds: Single 1- Pair 2
Shape : Trillion
Average Color : Fancy Black
Average Quality : AAA
Gemstone Dimensions : 7 mm - 10 mm
Treatment Method: Heated
Stone Creation Method : Natural
Origin : Unknown
MinDimension : 7 mm
MaxDimension : 10 mm
Color Information
Color : Black
Other Information
Gender : Mens, Womens
Material : Color Diamond
Weight Ranges for Black Diamonds:
7 mm -1.08 - 1.25 Cts
8 mm - 1.94 - 2.03 Cts
9 mm -2.53 - 3.09 Cts
10 mm - 3.00-4.00 Cts
How we grade
A: lighter colour, visible inclusions. Good for fashion pieces and practice settings.
AA: even colour, some inclusions you can see up close. Everyday jewelry.
AAA: rich colour, eye clean. Fine jewelry.
AAAA: the top colour we cut, eye clean. Statement and heirloom pieces.
Market Basics or Precision
Market Basics: good outlines; sizes and depths vary a little stone to stone. Best value for settings you adjust by hand.
Precision: even outlines and matched depths. Drops into pre-notched castings and lines up in rows and halos.