CaratHunter
Plans
Round|Natural|GIA

1.30ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 1553137824

Certificate GIA 1553137824

Diamond specifications and retailer prices

From £1,379 GBP
As of November 4, 2026
Save £1,829 GBP (57%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £3,855 GBP at NZ Jewellers · As of October 23, 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1553137824. Listed at 13 retailers as of November 4, 2026, with a 133% 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1553137824
Dimensions6.87 × 6.94 × 4.32 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
6.87 mm6.94 mm1.30 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1553137824
Side View
Table 58.0%Crown 36°Girdle: Slightly ThickPavilion 40.8°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 4
Current: £3,855 GBP|Low: £1,369 GBP|High: £3,909 GBP|Avg: £2,193 GBP|-1.4%
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
November 6, 2026
Retailer 3£1,379 GBP
Retailer 12£1,683 GBP
Retailer 8£1,687 GBP
Retailer 5£1,694 GBP
Retailer 2£1,748 GBP
Retailer 6£1,919 GBP
Retailer 4£1,921 GBP
Retailer 7£1,922 GBP
Retailer 10£2,230 GBP
Retailer 9£2,265 GBP
Retailer 13£2,810 GBP
Retailer 11£3,208 GBP
NZ Jewellers£3,855 GBP

30 data points across 13 retailers

13 retailers£1,379 GBP to £3,208 GBP

A
Cheapest Retailer
-
£1,379 GBP
A
Retailer 2
-
£1,683 GBP
View
A
Retailer 3
-
£1,687 GBP
View
Final sale: no returns
A
Retailer 4
-
£1,694 GBP
View
A
Retailer 5
-
£1,748 GBP
View
A
Retailer 6
-
£1,919 GBP
View
A
Retailer 7
-
£1,921 GBP
View
A
Retailer 8
-
£1,922 GBP
View
B+
Retailer 9
-
£2,230 GBP
View
B+
Retailer 10
-
£2,265 GBP
View
B+
Retailer 11
-
£2,810 GBP
View
B
Retailer 12
-
£3,208 GBP
View
Most Expensive
NZ Jewellers
18fc6ffb-5f84-40f0-8655-db590685a699 · Oct 23
£3,855 GBP
$5,189 USD
View
Price last confirmed 13 days ago
12 more retailers have this diamond
Prices start from £1,379 GBPSave up to £1,829 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
£1,379 GBP