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1.30ct D SI2 Round Natural Diamond

EX • D/SI2 • GIA 1399808576

Certificate GIA 1399808576

Diamond specifications and retailer prices

From £3,308 GBP
As of November 6, 2026
Save £5,967 GBP (64%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £9,275 GBP at Diamond Quarter · As of November 5, 2026
View at Diamond Quarter

About this 1.3ct natural round diamond

This 1.3ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1399808576. Listed at 10 retailers as of November 5, 2026, with prices from £3,308 to £9,275, a £5,967 spread on the same certified stone. Diamond Quarter lists it at £9,275. 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

1.30
Carat
D
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1399808576
Dimensions7.02 × 6.98 × 4.30 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Culet sizeNone
Top View
7.02 mm6.98 mm1.30 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1399808576
Side View
Table 59.0%Crown 35.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 61.6%

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: £4,775 GBP|Low: £3,308 GBP|High: £4,882 GBP|Avg: £4,136 GBP|+1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 6£3,308 GBP
Retailer 7£3,376 GBP
Retailer 8£3,604 GBP
Retailer 4£4,152 GBP
Retailer 3£4,428 GBP
Retailer 5£4,428 GBP
Retailer 9£4,577 GBP
Retailer 2£4,763 GBP
Retailer 1£4,775 GBP

40 data points across 9 retailers

10 retailers£3,308 GBP to £9,275 GBP

A
Cheapest Retailer
-
£3,308 GBP
A
Retailer 2
-
£3,376 GBP
View
A
Retailer 3
-
£3,604 GBP
View
B+
Retailer 4
-
£4,152 GBP
View
B+
Retailer 5
-
£4,428 GBP
View
B+
Retailer 6
-
£4,428 GBP
View
B+
Retailer 7
-
£4,577 GBP
View
B+
Retailer 8
-
£4,763 GBP
View
B+
Retailer 9
-
£4,775 GBP
View
Most Expensive
B
Diamond Quarter
1.3SI2D13765D26N · Nov 5
£9,275 GBP
View
9 more retailers have this diamond
Prices start from £3,308 GBPSave up to £5,967 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
1.30ct Round
£3,308 GBP