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Round|Natural|GIA

1.30ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 6551576530

Certificate GIA 6551576530

Diamond specifications and retailer prices

From £1,716 GBP
As of November 6, 2026
Save £1,375 GBP (44%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £3,698 GBP at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

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 K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6551576530. Listed at 9 retailers as of November 4, 2026, with a 80% 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

1.30
Carat
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6551576530
Dimensions7.00 × 6.97 × 4.27 mm
L/W Ratio1.00
Star length50%
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cavity, Needle
Top View
7.00 mm6.97 mm1.30 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6551576530
Side View
Table 59.0%Crown 35.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.2%

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 6
Current: £1,716 GBP|Low: £1,715 GBP|High: £3,136 GBP|Avg: £2,265 GBP|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 1£1,716 GBP
Retailer 2£1,860 GBP
Retailer 3£2,192 GBP
Retailer 4£3,091 GBP

43 data points across 4 retailers

9 retailers£1,716 GBP to £3,091 GBP

A
Cheapest Retailer
-
£1,716 GBP
Retailer 2
-
£1,769 GBP
View
Price last confirmed 29 days ago
Retailer 3
-
£1,769 GBP
View
Price last confirmed 29 days ago
Retailer 4
-
£1,851 GBP
View
Price last confirmed 38 days ago
A
Retailer 5
-
£1,860 GBP
View
Retailer 6
-
£2,041 GBP
View
Price last confirmed 38 days ago
B+
Retailer 7
-
£2,192 GBP
View
B
Retailer 8
-
£3,091 GBP
View
Most Expensive
NZ Jewellers
d3ba0be1-2a33-4eda-9c4c-65060e52b908 · Sep 28
£3,698 GBP
$4,977 USD
View
Price last confirmed 39 days ago
8 more retailers have this diamond
Prices start from £1,716 GBPSave up to £1,375 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
£1,716 GBP