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Round|Natural|GIA

1.51ct I SI1 Round Natural Diamond

GD • I/SI1 • GIA 1377240735

Certificate GIA 1377240735

Diamond specifications and retailer prices

From £2,809 GBP
HK$29,400 HKD
As of November 1, 2026
Save £3,523 GBP (56%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £6,332 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 standard cut grade and certified by GIA 1377240735. Listed at 18 retailers as of October 30, 2026, with prices from £2,809 to £6,332, a £3,523 spread on the same certified stone. NZ Jewellers lists it at £6,332. 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
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1377240735
Dimensions7.04 × 6.95 × 4.65 mm
L/W Ratio1.01
Key to symbols
Twinning Wisp, Feather
Top View
7.04 mm6.95 mm1.51 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1377240735
Side View
Table 57.0%CrownGirdle: ThickPavilionCulet: NoneDepth 66.5%

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 1
Current: £6,332 GBP|Low: £2,474 GBP|High: £6,332 GBP|Avg: £3,671 GBP|+9.0%
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
November 2, 2026
Retailer 15£2,809 GBP
Retailer 6£3,232 GBP
Retailer 4£3,302 GBP
Retailer 17£3,353 GBP
Retailer 5£3,494 GBP
Retailer 7£3,560 GBP
Retailer 10£3,571 GBP
Retailer 2£3,709 GBP
Retailer 3£3,785 GBP
Retailer 8£3,785 GBP
Retailer 9£3,785 GBP
Retailer 12£3,894 GBP
Retailer 18£3,899 GBP
Retailer 11£4,265 GBP
Retailer 16£4,368 GBP
Retailer 14£4,653 GBP
Retailer 13£6,029 GBP
NZ Jewellers£6,332 GBP

27 data points across 18 retailers

18 retailers£2,809 GBP to £6,332 GBP

B+
Cheapest Retailer
-
£2,809 GBP
HK$29,400 HKD
B+
Retailer 2
-
£3,232 GBP
$4,331 USD
View
B+
Retailer 3
-
£3,302 GBP
$4,424 USD
View
B+
Retailer 4
-
£3,353 GBP
$4,492 USD
View
B+
Retailer 5
-
£3,494 GBP
$4,681 USD
View
Final sale: no returns
B+
Retailer 6
-
£3,560 GBP
$4,770 USD
View
B+
Retailer 7
-
£3,571 GBP
SGD 6,466 SGD
View
B+
Retailer 8
-
£3,709 GBP
View
B+
Retailer 9
-
£3,785 GBP
$5,072 USD
View
B+
Retailer 10
-
£3,785 GBP
$5,072 USD
View
B+
Retailer 11
-
£3,785 GBP
$5,072 USD
View
B+
Retailer 12
-
£3,894 GBP
View
B+
Retailer 13
-
£3,899 GBP
$5,224 USD
View
B+
Retailer 14
-
£4,265 GBP
€5,443 EUR
View
B
Retailer 15
-
£4,368 GBP
$5,853 USD
View
B
Retailer 16
-
£4,653 GBP
ZAR 100,727 ZAR
View
B
Retailer 17
-
£6,029 GBP
View
Most Expensive
B
NZ Jewellers
b1e3832e-6607-4c7c-8ab6-d32f401f6ec3 · Oct 30
£6,332 GBP
$8,484 USD
View
17 more retailers have this diamond
Prices start from £2,809 GBPSave up to £3,523 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
£2,809 GBP