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1.28ct J SI2 Round Natural Diamond

GD • J/SI2 • GIA 2233605885

Certificate GIA 2233605885

Diamond specifications and retailer prices

From £2,077 GBP
€2,651 EUR
As of November 1, 2026
Save £63 GBP (3%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £2,141 GBP at 77 Diamonds · As of November 2, 2026
View at 77 Diamonds

About this 1.28ct natural round diamond

This 1.28ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade and certified by GIA 2233605885. Listed at 2 retailers as of November 1, 2026, with a relatively tight 3% spread, which is unusual at this carat range and suggests competitive pricing across the listings. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.28
Carat
J
Colour
SI2
Clarity
Good
Cut

Specifications

CutGood
PolishGood
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 2233605885
Dimensions7.24 × 7.30 × 4.07 mm
L/W Ratio1.01
Culet sizeVery Small
Top View
7.24 mm7.30 mm1.28 ctJ / SI2
OriginNatural
CutGood
PolishGood
SymmetryVery Good
FluorescenceMedium
CertificateGIA 2233605885
Side View
Table 65.0%CrownGirdle: VTN-MEDPavilionCulet: Very SmallDepth 55.9%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 1
Current: £2,141 GBP|Low: £1,993 GBP|High: £2,155 GBP|Avg: £2,102 GBP|+0.7%
77 Diamonds
Retailer 2
November 2, 2026
Retailer 2£2,077 GBP
77 Diamonds£2,141 GBP

37 data points across 2 retailers

2 retailers£2,077 GBP to £2,141 GBP

B
Cheapest Retailer
-
£2,077 GBP
€2,651 EUR
Most Expensive
B
77 Diamonds
RBMBTVDEJJCM · Nov 2
£2,141 GBP
View
1 more retailer has this diamond
Prices start from £2,077 GBPSave up to £63 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B
1.28ct Round
£2,077 GBP