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Round|Natural|GIA

1.51ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 1477667158

Certificate GIA 1477667158

Diamond specifications and retailer prices

From £3,329 GBP
As of November 4, 2026
Save £3,251 GBP (49%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £6,581 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1477667158. Listed at 13 retailers as of November 4, 2026, with prices from £3,329 to £6,581, a £3,251 spread on the same certified stone. NZ Jewellers lists it at £6,581. 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 angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1477667158
Dimensions7.35 × 7.30 × 4.56 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal, Cavity, Cloud, Needle
Top View
7.35 mm7.30 mm1.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1477667158
Side View
Table 58.0%Crown 36.5°Girdle: -NUPavilion 41°Culet: NoneDepth 62.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £5,193 GBP|Low: £3,329 GBP|High: £6,341 GBP|Avg: £4,267 GBP|-1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 7£3,329 GBP
Retailer 6£3,432 GBP
Retailer 5£3,473 GBP
Retailer 3£3,864 GBP
Retailer 8£3,935 GBP
Retailer 2£4,182 GBP
Retailer 1£5,193 GBP
Retailer 4£6,249 GBP

44 data points across 8 retailers

13 retailers£3,329 GBP to £6,581 GBP

B+
Cheapest Retailer
-
£3,329 GBP
B+
Retailer 2
-
£3,432 GBP
View
B+
Retailer 3
-
£3,473 GBP
View
B+
Retailer 4
-
£3,864 GBP
View
B
Retailer 5
-
£3,906 GBP
View
B
Retailer 6
-
£3,935 GBP
View
B
Retailer 7
-
£3,935 GBP
View
B
Retailer 8
-
£4,048 GBP
View
B+
Retailer 9
-
£4,182 GBP
View
B
Retailer 10
-
£4,540 GBP
View
B
Retailer 11
-
£5,193 GBP
View
B
Retailer 12
-
£6,249 GBP
View
Most Expensive
C
NZ Jewellers
97904990-d689-4c74-87d2-ab871c0af8d1 · Nov 5
£6,581 GBP
$8,857 USD
View
12 more retailers have this diamond
Prices start from £3,329 GBPSave up to £3,251 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.

B+
1.51ct Round
£3,329 GBP