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Round|Natural|GIA

1.51ct I SI1 Round Natural Diamond

VG • I/SI1 • GIA 1549280379

Certificate GIA 1549280379

Diamond specifications and retailer prices

From £2,822 GBP
$3,781 USD
As of October 31, 2026
Save £3,629 GBP (56%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £6,451 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 1549280379. Listed at 24 retailers as of October 30, 2026, with prices from £2,822 to £6,451, a £3,629 spread on the same certified stone. NZ Jewellers lists it at £6,451. 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
FluorescenceNone
Crown angle38.5°
Pavilion angle39.8°
OriginNatural
Grading LabGIA
CertificateGIA 1549280379
Dimensions7.16 × 7.10 × 4.60 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
7.16 mm7.10 mm1.51 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1549280379
Side View
Table 55.0%Crown 38.5°Girdle: STK-THKPavilion 39.8°Culet: NoneDepth 64.4%

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: Oct 31
Current: £6,451 GBP|Low: £2,786 GBP|High: £6,451 GBP|Avg: £3,872 GBP
NZ Jewellers
Retailer 2
Retailer 3
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Retailer 22
Retailer 23
Retailer 24
November 1, 2026
Retailer 6£2,822 GBP
Retailer 21£2,885 GBP
Retailer 22£2,987 GBP
Retailer 23£3,048 GBP
Retailer 8£3,070 GBP
Retailer 12£3,226 GBP
Retailer 11£3,299 GBP
Retailer 3£3,306 GBP
Retailer 9£3,494 GBP
Retailer 14£3,494 GBP
Retailer 16£3,494 GBP
Retailer 4£3,747 GBP
Retailer 5£3,747 GBP
Retailer 19£3,825 GBP
Retailer 24£3,866 GBP
Retailer 17£3,912 GBP
Retailer 13£3,967 GBP
Retailer 15£4,032 GBP
Retailer 2£4,103 GBP
Retailer 7£4,257 GBP
Retailer 10£4,488 GBP
Retailer 20£4,741 GBP
Retailer 18£6,143 GBP
NZ Jewellers£6,451 GBP

25 data points across 24 retailers

24 retailers£2,822 GBP to £6,451 GBP

A
Cheapest Retailer
-
£2,822 GBP
$3,781 USD
A
Retailer 2
-
£2,885 GBP
HK$30,200 HKD
View
A
Retailer 3
-
£2,987 GBP
$4,002 USD
View
A
Retailer 4
-
£3,048 GBP
$4,084 USD
View
A
Retailer 5
-
£3,070 GBP
$4,113 USD
View
B+
Retailer 6
-
£3,226 GBP
$4,322 USD
View
Final sale: no returns
A
Retailer 7
-
£3,299 GBP
$4,420 USD
View
A
Retailer 8
-
£3,306 GBP
$4,430 USD
View
B+
Retailer 9
-
£3,494 GBP
$4,682 USD
View
A
Retailer 10
-
£3,494 GBP
$4,682 USD
View
A
Retailer 11
-
£3,494 GBP
$4,682 USD
View
B+
Retailer 12
-
£3,747 GBP
$5,020 USD
View
A
Retailer 13
-
£3,747 GBP
$5,020 USD
View
A
Retailer 14
-
£3,825 GBP
View
A
Retailer 15
-
£3,866 GBP
$5,180 USD
View
Retailer 16
-
£3,912 GBP
A$8,064 AUD
View
Price last confirmed 23 days ago
B+
Retailer 17
-
£3,967 GBP
View
B+
Retailer 18
-
£4,032 GBP
$5,402 USD
View
B+
Retailer 19
-
£4,103 GBP
€5,236 EUR
View
Retailer 20
-
£4,257 GBP
$5,704 USD
View
Price last confirmed 9 days ago
B+
Retailer 21
-
£4,488 GBP
$6,013 USD
View
B+
Retailer 22
-
£4,741 GBP
ZAR 102,624 ZAR
View
B
Retailer 23
-
£6,143 GBP
View
Most Expensive
B
NZ Jewellers
3e2f5f46-1ce4-4305-949f-1309faa1ab4c · Oct 30
£6,451 GBP
$8,643 USD
View
23 more retailers have this diamond
Prices start from £2,822 GBPSave up to £3,629 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
£2,822 GBP