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1.30ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 6565511617

Certificate GIA 6565511617

Diamond specifications and retailer prices

From £1,664 GBP
As of November 6, 2026
Save £1,558 GBP (48%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £3,222 GBP at With Clarity · As of November 6, 2026
View at With Clarity

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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6565511617. Listed at 6 retailers as of November 6, 2026, with prices from £1,664 to £3,222, a £1,558 spread on the same certified stone. With Clarity lists it at £3,222. 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
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6565511617
Dimensions6.93 × 6.98 × 4.36 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cloud, Cavity, Needle
Top View
6.93 mm6.98 mm1.30 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6565511617
Side View
Table 57.0%Crown 36.5°Girdle: Slightly ThickPavilion 41°Culet: NoneDepth 62.7%

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: £1,664 GBP|Low: £1,664 GBP|High: £3,286 GBP|Avg: £2,304 GBP|-3.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
With Clarity
November 6, 2026
Retailer 1£1,664 GBP
Retailer 4£1,793 GBP
Retailer 5£2,015 GBP
Retailer 3£2,264 GBP
Retailer 2£2,310 GBP
With Clarity£3,222 GBP

8 data points across 6 retailers

6 retailers£1,664 GBP to £3,222 GBP

A
Cheapest Retailer
-
£1,664 GBP
A
Retailer 2
-
£1,793 GBP
View
A
Retailer 3
-
£2,015 GBP
View
A
Retailer 4
-
£2,264 GBP
View
A
Retailer 5
-
£2,310 GBP
View
Most Expensive
B+
With Clarity
6565511617 · Nov 6
£3,222 GBP
$4,312 USD
View
5 more retailers have this diamond
Prices start from £1,664 GBPSave up to £1,558 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
£1,664 GBP