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Round|Natural|GIA

1.51ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 6561440326

Certificate GIA 6561440326

Diamond specifications and retailer prices

From £1,528 GBP
As of November 5, 2026
Save £1,449 GBP (49%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £2,977 GBP at Wholesale Diamonds Direct · As of November 4, 2026
View at Wholesale Diamonds Direct

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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6561440326. Listed at 9 retailers as of November 4, 2026, with prices from £1,528 to £2,977, a £1,449 spread on the same certified stone. Wholesale Diamonds Direct lists it at £2,977. 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle34°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 6561440326
Dimensions7.33 × 4.55 × 4.55 mm
L/W Ratio1.61
Culet sizeNone
Top View
7.33 mm4.55 mm1.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6561440326
Side View
Table 57.0%Crown 34°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 61.9%

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 5
Current: £1,528 GBP|Low: £1,520 GBP|High: £3,369 GBP|Avg: £2,259 GBP|-2.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Wholesale Diamonds Direct
November 5, 2026
Retailer 1£1,528 GBP
Retailer 7£1,817 GBP
Retailer 4£1,900 GBP
Retailer 6£1,900 GBP
Retailer 3£1,927 GBP
Retailer 2£2,178 GBP
Retailer 5£2,259 GBP
Retailer 8£2,376 GBP
Wholesale Diamonds Direct£2,977 GBP

18 data points across 9 retailers

9 retailers£1,528 GBP to £2,977 GBP

A
Cheapest Retailer
-
£1,528 GBP
A
Retailer 2
-
£1,817 GBP
View
A
Retailer 3
-
£1,900 GBP
View
A
Retailer 4
-
£1,900 GBP
View
A
Retailer 5
-
£1,927 GBP
View
A
Retailer 6
-
£2,178 GBP
View
A
Retailer 7
-
£2,259 GBP
View
Retailer 8
-
£2,376 GBP
View
Price last confirmed 11 days ago
Most Expensive
B+
Wholesale Diamonds Direct
570704302 · Nov 4
£2,977 GBP
$4,007 USD
View
8 more retailers have this diamond
Prices start from £1,528 GBPSave up to £1,449 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
£1,528 GBP