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Round|Natural|GIA

1.51ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 2546595232

Certificate GIA 2546595232

Diamond specifications and retailer prices

From £2,206 GBP
As of November 6, 2026
Save £2,990 GBP (58%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £5,196 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2546595232. Listed at 15 retailers as of November 5, 2026, with prices from £2,206 to £5,196, a £2,990 spread on the same certified stone. NZ Jewellers lists it at £5,196. 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

1.51
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2546595232
Dimensions7.25 × 7.30 × 4.57 mm
L/W Ratio1.01
Top View
7.25 mm7.30 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2546595232
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.9%

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: £5,196 GBP|Low: £2,187 GBP|High: £5,233 GBP|Avg: £3,215 GBP
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 6, 2026
Retailer 11£2,206 GBP
Retailer 4£2,398 GBP
Retailer 5£2,537 GBP
Retailer 12£2,593 GBP
Retailer 3£2,702 GBP
Retailer 13£2,702 GBP
Retailer 14£2,806 GBP
Retailer 7£2,984 GBP
Retailer 6£3,118 GBP
Retailer 9£3,133 GBP
Retailer 2£3,247 GBP
Retailer 8£3,640 GBP
Retailer 10£4,986 GBP
NZ Jewellers£5,196 GBP

38 data points across 14 retailers

15 retailers£2,206 GBP to £5,196 GBP

A
Cheapest Retailer
-
£2,206 GBP
A
Retailer 2
-
£2,398 GBP
View
A
Retailer 3
-
£2,537 GBP
View
A
Retailer 4
-
£2,593 GBP
View
Retailer 5
-
£2,702 GBP
View
Price last confirmed 8 days ago
A
Retailer 6
-
£2,702 GBP
View
B+
Retailer 7
-
£2,806 GBP
View
B+
Retailer 8
-
£2,984 GBP
View
B+
Retailer 9
-
£3,118 GBP
View
B+
Retailer 10
-
£3,133 GBP
View
B+
Retailer 11
-
£3,247 GBP
View
Retailer 12
-
£3,499 GBP
View
Price last confirmed 14 days ago
B+
Retailer 13
-
£3,640 GBP
View
B
Retailer 14
-
£4,986 GBP
View
Most Expensive
B
NZ Jewellers
18b521fa-8fb0-499f-b2fe-e453b0e89815 · Nov 5
£5,196 GBP
$6,993 USD
View
14 more retailers have this diamond
Prices start from £2,206 GBPSave up to £2,990 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
1.51ct Round
£2,206 GBP