Round|Natural|GIA

1.29ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 1413595348

Certificate GIA 1413595348

Diamond specifications and retailer prices

From £2,721 GBP
As of November 4, 2026
Save £2,666 GBP (49%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £5,387 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1413595348. Listed at 14 retailers as of November 4, 2026, with prices from £2,721 to £5,387, a £2,666 spread on the same certified stone. NZ Jewellers lists it at £5,387. 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 1413595348
Dimensions6.90 × 6.95 × 4.35 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Culet sizeNone
Top View
6.90 mm6.95 mm1.29 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1413595348
Side View
Table 57.0%Crown 36.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.8%

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 4
Current: £5,387 GBP|Low: £2,310 GBP|High: £5,387 GBP|Avg: £3,342 GBP|+13.2%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 5, 2026
Retailer 4£2,721 GBP
Retailer 11£2,767 GBP
Retailer 5£2,854 GBP
Retailer 6£2,870 GBP
Retailer 8£2,917 GBP
Retailer 13£2,944 GBP
Retailer 10£3,092 GBP
Retailer 14£3,092 GBP
Retailer 12£3,202 GBP
Retailer 7£3,476 GBP
Retailer 3£3,567 GBP
Retailer 2£3,774 GBP
Retailer 9£5,047 GBP
NZ Jewellers£5,387 GBP

38 data points across 14 retailers

14 retailers£2,721 GBP to £5,387 GBP

A
Cheapest Retailer
-
£2,721 GBP
A
Retailer 2
-
£2,767 GBP
View
B+
Retailer 3
-
£2,854 GBP
View
Final sale: no returns
Retailer 4
-
£2,870 GBP
View
Price last confirmed 43 days ago
A
Retailer 5
-
£2,917 GBP
View
B+
Retailer 6
-
£2,944 GBP
View
Retailer 7
-
£3,092 GBP
View
Price last confirmed 8 days ago
B+
Retailer 8
-
£3,092 GBP
View
B+
Retailer 9
-
£3,202 GBP
View
B+
Retailer 10
-
£3,476 GBP
View
B
Retailer 11
-
£3,567 GBP
View
B+
Retailer 12
-
£3,774 GBP
View
B
Retailer 13
-
£5,047 GBP
View
Most Expensive
B
NZ Jewellers
ac07a730-ca1a-4f4b-aa31-0f9ae0dfae68 · Nov 5
£5,387 GBP
$7,210 USD
View
13 more retailers have this diamond
Prices start from £2,721 GBPSave up to £2,666 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
£2,721 GBP