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Heart|Natural|GIA

1.51ct J SI2 Heart Natural Diamond

EX • J/SI2 • GIA 6551196917

Certificate GIA 6551196917

Diamond specifications and retailer prices

From £1,733 GBP
SGD 3,137 SGD
As of October 31, 2026
Save £1,434 GBP (45%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,167 GBP at Wholesale Diamonds Direct · As of October 27, 2026
View at Wholesale Diamonds Direct

About this 1.51ct natural heart diamond

This 1.51ct natural heart sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6551196917. Listed at 11 retailers as of October 27, 2026, with prices from £1,733 to £3,167, a £1,434 spread on the same certified stone. Wholesale Diamonds Direct lists it at £3,167. 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
J
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.8°
Pavilion angle38.08°
OriginNatural
Grading LabGIA
CertificateGIA 6551196917
Dimensions6.78 × 7.90 × 4.72 mm
L/W Ratio1.17
Culet sizeNone
Top View
6.78 mm7.90 mm1.51 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551196917
Side View
Table 59.0%Crown 43.8°Girdle: THN-STKPavilion 38.08°Culet: NoneDepth 59.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £2,032 GBP|Low: £1,733 GBP|High: £3,414 GBP|Avg: £2,237 GBP|-5.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Wholesale Diamonds Direct
November 2, 2026
Retailer 6£1,733 GBP
Retailer 9£1,829 GBP
Retailer 4£1,849 GBP
Retailer 3£1,882 GBP
Retailer 1£2,032 GBP
Retailer 8£2,049 GBP
Retailer 7£2,209 GBP
Retailer 5£2,224 GBP
Retailer 2£2,360 GBP
Wholesale Diamonds Direct£3,167 GBP

36 data points across 10 retailers

11 retailers£1,733 GBP to £3,167 GBP

A
Cheapest Retailer
-
£1,733 GBP
SGD 3,137 SGD
A
Retailer 2
-
£1,829 GBP
$2,451 USD
View
A
Retailer 3
-
£1,849 GBP
$2,478 USD
View
A
Retailer 4
-
£1,882 GBP
$2,521 USD
View
A
Retailer 5
-
£2,032 GBP
View
A
Retailer 6
-
£2,049 GBP
SGD 3,710 SGD
View
A
Retailer 7
-
£2,209 GBP
$2,960 USD
View
A
Retailer 8
-
£2,216 GBP
$2,969 USD
View
A
Retailer 9
-
£2,224 GBP
$2,980 USD
View
A
Retailer 10
-
£2,360 GBP
$3,162 USD
View
Most Expensive
B+
Wholesale Diamonds Direct
387037273 · Oct 27
£3,167 GBP
$4,243 USD
View
10 more retailers have this diamond
Prices start from £1,733 GBPSave up to £1,434 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 Heart
£1,733 GBP