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Round|Natural|GIA

1.51ct I SI1 Round Natural Diamond

VG • I/SI1 • GIA 6531260924

Certificate GIA 6531260924

Diamond specifications and retailer prices

From £2,484 GBP
HK$26,000 HKD
As of November 1, 2026
Save £3,370 GBP (58%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £5,853 GBP at NZ Jewellers · As of October 30, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by GIA 6531260924. Listed at 19 retailers as of October 30, 2026, with prices from £2,484 to £5,853, a £3,370 spread on the same certified stone. NZ Jewellers lists it at £5,853. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
I
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceVery Strong
Crown angle37°
Pavilion angle40°
OriginNatural
Grading LabGIA
CertificateGIA 6531260924
Dimensions7.20 × 7.11 × 4.54 mm
L/W Ratio1.01
Top View
7.20 mm7.11 mm1.51 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceVery Strong
CertificateGIA 6531260924
Side View
Table 58.0%Crown 37°Girdle: STK-THKPavilion 40°Culet: NoneDepth 63.5%

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 1
Current: £5,853 GBP|Low: £2,455 GBP|High: £5,853 GBP|Avg: £3,642 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
Retailer 15
November 2, 2026
Retailer 9£2,484 GBP
Retailer 11£2,872 GBP
Retailer 13£2,997 GBP
Retailer 15£3,100 GBP
Retailer 14£3,101 GBP
Retailer 2£3,212 GBP
Retailer 4£3,360 GBP
Retailer 5£3,360 GBP
Retailer 3£3,387 GBP
Retailer 7£3,391 GBP
Retailer 12£3,768 GBP
Retailer 8£3,786 GBP
Retailer 6£3,876 GBP
Retailer 10£5,380 GBP
NZ Jewellers£5,853 GBP

43 data points across 15 retailers

19 retailers£2,484 GBP to £5,853 GBP

A
Cheapest Retailer
-
£2,484 GBP
HK$26,000 HKD
B+
Retailer 2
-
£2,872 GBP
$3,848 USD
View
B+
Retailer 3
-
£2,907 GBP
$3,895 USD
View
B+
Retailer 4
-
£2,930 GBP
$3,926 USD
View
B+
Retailer 5
-
£2,997 GBP
$4,015 USD
View
B+
Retailer 6
-
£3,100 GBP
$4,154 USD
View
Final sale: no returns
A
Retailer 7
-
£3,101 GBP
SGD 5,615 SGD
View
Retailer 8
-
£3,126 GBP
SGD 5,661 SGD
View
Price last confirmed 7 days ago
A
Retailer 9
-
£3,212 GBP
View
B+
Retailer 10
-
£3,360 GBP
$4,502 USD
View
B+
Retailer 11
-
£3,360 GBP
$4,502 USD
View
Retailer 12
-
£3,387 GBP
A$6,982 AUD
View
Price last confirmed 23 days ago
B+
Retailer 13
-
£3,391 GBP
$4,543 USD
View
B+
Retailer 14
-
£3,768 GBP
View
B+
Retailer 15
-
£3,786 GBP
€4,831 EUR
View
B+
Retailer 16
-
£3,876 GBP
$5,194 USD
View
B
Retailer 17
-
£4,775 GBP
$6,398 USD
View
B
Retailer 18
-
£5,380 GBP
View
Most Expensive
B
NZ Jewellers
1cc335ea-eb93-44d1-91b3-413f7d96281e · Oct 30
£5,853 GBP
$7,843 USD
View
18 more retailers have this diamond
Prices start from £2,484 GBPSave up to £3,370 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
£2,484 GBP