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Round|Natural|GIA

1.51ct D SI2 Round Natural Diamond

EX • D/SI2 • GIA 1528655808

Certificate GIA 1528655808

Diamond specifications and retailer prices

From £4,070 GBP
HK$42,600 HKD
As of October 30, 2026
Save £1,968 GBP (33%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £9,137 GBP at NZ Jewellers · As of October 20, 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 D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1528655808. Listed at 15 retailers as of October 29, 2026, with a 48% 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
D
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 1528655808
Dimensions7.31 × 7.26 × 4.57 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
7.31 mm7.26 mm1.51 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1528655808
Side View
Table 59.0%Crown 34.5°Girdle: Sli. ThickPavilion 41.8°Culet: NoneDepth 62.9%

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 30
Current: £6,038 GBP|Low: £4,070 GBP|High: £7,705 GBP|Avg: £5,306 GBP|+4.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 29, 2026
Retailer 2£4,070 GBP
Retailer 11£4,679 GBP
Retailer 9£4,738 GBP
Retailer 10£4,765 GBP
Retailer 7£5,042 GBP
Retailer 3£5,067 GBP
Retailer 12£5,547 GBP
Retailer 4£5,584 GBP
Retailer 8£5,643 GBP
Retailer 5£5,791 GBP
Retailer 1£6,038 GBP
Retailer 6£7,654 GBP

38 data points across 12 retailers

15 retailers£4,070 GBP to £6,038 GBP

A
Cheapest Retailer
-
£4,070 GBP
HK$42,600 HKD
Retailer 2
-
£4,679 GBP
SGD 8,472 SGD
View
Price last confirmed 15 days ago
Retailer 3
-
£4,738 GBP
$6,348 USD
View
Price last confirmed 9 days ago
Retailer 4
-
£4,765 GBP
$6,384 USD
View
Price last confirmed 10 days ago
Retailer 5
-
£5,043 GBP
$6,757 USD
View
Price last confirmed 14 days ago
Retailer 6
-
£5,067 GBP
$6,789 USD
View
Price last confirmed 9 days ago
Retailer 7
-
£5,463 GBP
$7,320 USD
View
Price last confirmed 10 days ago
Retailer 8
-
£5,547 GBP
$7,432 USD
View
Price last confirmed 15 days ago
Retailer 9
-
£5,584 GBP
$7,482 USD
View
Price last confirmed 12 days ago
Retailer 10
-
£5,643 GBP
$7,561 USD
View
Price last confirmed 10 days ago
B+
Retailer 11
-
£5,791 GBP
View
B+
Retailer 12
-
£6,038 GBP
€7,705 EUR
View
Retailer 13
-
£6,304 GBP
$8,446 USD
View
Price last confirmed 10 days ago
Retailer 14
-
£7,654 GBP
View
Price last confirmed 9 days ago
Most Expensive
NZ Jewellers
c8cb68a7-a504-4204-b599-d2c867a570ef · Oct 20
£9,137 GBP
$12,242 USD
View
Price last confirmed 10 days ago
14 more retailers have this diamond
Prices start from £4,070 GBPSave up to £1,968 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
£4,070 GBP