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Round|Natural|GIA

1.51ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 7561487212

Certificate GIA 7561487212

Diamond specifications and retailer prices

From £2,434 GBP
As of November 6, 2026
Save £3,329 GBP (58%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £6,075 GBP at NZ Jewellers · As of October 9, 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 7561487212. Listed at 18 retailers as of November 5, 2026, with a 137% 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

1.51
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 7561487212
Dimensions7.29 × 7.24 × 4.55 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
7.29 mm7.24 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7561487212
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.6%

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 6
Current: £5,763 GBP|Low: £2,406 GBP|High: £6,075 GBP|Avg: £3,634 GBP|-5.1%
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 6, 2026
Retailer 18£2,434 GBP
Retailer 10£2,623 GBP
Retailer 17£2,707 GBP
Retailer 19£2,910 GBP
Retailer 4£2,927 GBP
Retailer 6£3,054 GBP
Retailer 14£3,057 GBP
Retailer 13£3,063 GBP
Retailer 9£3,112 GBP
Retailer 5£3,212 GBP
Retailer 7£3,395 GBP
Retailer 3£3,494 GBP
Retailer 12£3,602 GBP
Retailer 11£3,741 GBP
Retailer 15£4,036 GBP
Retailer 8£4,133 GBP
Retailer 2£5,111 GBP
Retailer 16£5,254 GBP
NZ Jewellers£5,763 GBP

27 data points across 19 retailers

18 retailers£2,434 GBP to £5,763 GBP

A
Cheapest Retailer
-
£2,434 GBP
Retailer 2
-
£2,623 GBP
View
Price last confirmed 23 days ago
A
Retailer 3
-
£2,707 GBP
View
A
Retailer 4
-
£2,910 GBP
View
A
Retailer 5
-
£2,927 GBP
View
B+
Retailer 6
-
£3,054 GBP
View
Final sale: no returns
B+
Retailer 7
-
£3,057 GBP
View
B+
Retailer 8
-
£3,063 GBP
View
B+
Retailer 9
-
£3,112 GBP
View
B+
Retailer 10
-
£3,212 GBP
View
B+
Retailer 11
-
£3,395 GBP
View
B+
Retailer 12
-
£3,494 GBP
View
B+
Retailer 13
-
£3,602 GBP
View
B
Retailer 14
-
£4,036 GBP
View
B
Retailer 15
-
£5,111 GBP
View
B
Retailer 16
-
£5,254 GBP
View
B
Retailer 17
-
£5,763 GBP
View
Most Expensive
NZ Jewellers
576f1a53-d4c8-45e6-8ec8-5f967e3b2114 · Oct 9
£6,075 GBP
$8,177 USD
View
Price last confirmed 28 days ago
17 more retailers have this diamond
Prices start from £2,434 GBPSave up to £3,329 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
£2,434 GBP