Round|Natural|GIA

1.29ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 7551816597

Certificate GIA 7551816597

Diamond specifications and retailer prices

From £1,603 GBP
As of November 5, 2026
Save £637 GBP (28%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £2,846 GBP at Wholesale Diamonds Direct · As of October 26, 2026
View at Wholesale Diamonds Direct

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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7551816597. Listed at 15 retailers as of November 5, 2026, with a 40% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle32.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 7551816597
Dimensions6.98 × 7.01 × 4.29 mm
L/W Ratio1.00
Culet sizeNone
Top View
6.98 mm7.01 mm1.29 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 7551816597
Side View
Table 58.0%Crown 32.5°Girdle: THN-STKPavilion 41.6°Culet: NoneDepth 61.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £1,603 GBP|Low: £1,594 GBP|High: £2,985 GBP|Avg: £2,091 GBP|-6.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Wholesale Diamonds Direct
November 5, 2026
Retailer 1£1,603 GBP
Retailer 11£1,684 GBP
Retailer 10£1,717 GBP
Retailer 9£1,731 GBP
Retailer 8£1,859 GBP
Retailer 4£1,885 GBP
Retailer 12£1,935 GBP
Retailer 2£2,042 GBP
Retailer 3£2,141 GBP
Retailer 6£2,163 GBP
Retailer 7£2,171 GBP
Retailer 5£2,268 GBP
Retailer 13£2,640 GBP
Wholesale Diamonds Direct£2,846 GBP

27 data points across 14 retailers

15 retailers£1,603 GBP to £2,241 GBP

A
Cheapest Retailer
-
£1,603 GBP
Retailer 2
-
£1,684 GBP
View
Price last confirmed 7 days ago
Retailer 3
-
£1,717 GBP
View
Price last confirmed 7 days ago
Retailer 4
-
£1,731 GBP
View
Price last confirmed 9 days ago
Retailer 5
-
£1,859 GBP
View
Price last confirmed 7 days ago
Retailer 6
-
£1,885 GBP
View
Price last confirmed 7 days ago
A
Retailer 7
-
£1,935 GBP
View
A
Retailer 8
-
£2,042 GBP
View
A
Retailer 9
-
£2,141 GBP
View
A
Retailer 10
-
£2,163 GBP
View
Retailer 11
-
£2,171 GBP
View
Price last confirmed 7 days ago
A
Retailer 12
-
£2,241 GBP
View
Retailer 13
-
£2,268 GBP
View
Price last confirmed 11 days ago
Retailer 14
-
£2,640 GBP
View
Price last confirmed 7 days ago
Most Expensive
Wholesale Diamonds Direct
611240164 · Oct 26
£2,846 GBP
$3,809 USD
View
Price last confirmed 11 days ago
14 more retailers have this diamond
Prices start from £1,603 GBPSave up to £637 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.

A
1.29ct Round
£1,603 GBP