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Round|Natural|GIA

1.29ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2468621474

Certificate GIA 2468621474

Diamond specifications and retailer prices

From £2,731 GBP
As of November 6, 2026
Save £1,247 GBP (31%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £3,978 GBP at 77 Diamonds · As of November 5, 2026
View at 77 Diamonds

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 2468621474. Listed at 8 retailers as of November 5, 2026, with prices from £2,731 to £3,978, a £1,247 spread on the same certified stone. 77 Diamonds lists it at £3,978. 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
FluorescenceNone
Crown angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2468621474
Dimensions6.95 × 6.97 × 4.35 mm
L/W Ratio1.00
Top View
6.95 mm6.97 mm1.29 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2468621474
Side View
Table 56.0%Crown 36.5°Girdle: THN-MEDPavilion 41°Culet: NoneDepth 62.5%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: £3,978 GBP|Low: £2,705 GBP|High: £4,035 GBP|Avg: £3,383 GBP|+0.9%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 5, 2026
Retailer 4£2,731 GBP
Retailer 5£2,926 GBP
Retailer 3£3,372 GBP
Retailer 2£3,877 GBP
77 Diamonds£3,978 GBP

39 data points across 5 retailers

8 retailers£2,731 GBP to £3,978 GBP

A
Cheapest Retailer
-
£2,731 GBP
B+
Retailer 2
-
£2,926 GBP
View
B+
Retailer 3
-
£3,027 GBP
View
B+
Retailer 4
-
£3,372 GBP
View
Retailer 5
-
£3,372 GBP
View
Price last confirmed 8 days ago
Retailer 6
-
£3,372 GBP
View
Price last confirmed 30 days ago
B+
Retailer 7
-
£3,877 GBP
View
Most Expensive
B
77 Diamonds
RBMBZPFCHBF5 · Nov 5
£3,978 GBP
View
7 more retailers have this diamond
Prices start from £2,731 GBPSave up to £1,247 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
£2,731 GBP