Round|Natural|GIA

1.29ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 6515963227

Certificate GIA 6515963227

Diamond specifications and retailer prices

From £1,959 GBP
As of November 6, 2026
Save £2,477 GBP (56%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £4,436 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.29ct natural round diamond

This 1.29ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6515963227. Listed at 7 retailers as of November 5, 2026, with prices from £1,959 to £4,436, a £2,477 spread on the same certified stone. NZ Jewellers lists it at £4,436. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.29
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 6515963227
Dimensions6.91 × 6.97 × 4.29 mm
L/W Ratio1.01
Star length50%
Top View
6.91 mm6.97 mm1.29 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6515963227
Side View
Table 60.0%Crown 35°Girdle: STK-STKPavilion 41.2°Culet: NoneDepth 61.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £2,481 GBP|Low: £1,544 GBP|High: £3,762 GBP|Avg: £2,516 GBP
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 5, 2026
Retailer 4£1,959 GBP
Retailer 5£2,053 GBP
Retailer 6£2,437 GBP
Retailer 1£2,481 GBP
Retailer 3£2,504 GBP
Retailer 2£3,708 GBP

21 data points across 6 retailers

7 retailers£1,959 GBP to £4,436 GBP

B+
Cheapest Retailer
-
£1,959 GBP
Final sale: no returns
B+
Retailer 2
-
£2,053 GBP
View
B+
Retailer 3
-
£2,437 GBP
View
B+
Retailer 4
-
£2,481 GBP
View
B+
Retailer 5
-
£2,504 GBP
View
B
Retailer 6
-
£3,708 GBP
View
Most Expensive
B
NZ Jewellers
011ca95d-346c-4cf3-85be-111a1d57f8d7 · Nov 5
£4,436 GBP
$5,938 USD
View
6 more retailers have this diamond
Prices start from £1,959 GBPSave up to £2,477 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+
1.29ct Round
£1,959 GBP