CaratHunter
Plans
Heart|Natural|GIA

1.51ct I SI2 Heart Natural Diamond

EX • I/SI2 • GIA 3555615885

Certificate GIA 3555615885

Diamond specifications and retailer prices

From £2,004 GBP
$2,685 USD
As of November 1, 2026
Save £349 GBP (15%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £3,499 GBP at Wholesale Diamonds Direct · As of October 14, 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 I 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 3555615885. Listed at 7 retailers as of November 1, 2026, with a relatively tight 17% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.91°
Pavilion angle40.12°
OriginNatural
Grading LabGIA
CertificateGIA 3555615885
Dimensions6.92 × 7.90 × 4.72 mm
L/W Ratio1.14
Culet sizeNone
Top View
6.92 mm7.90 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3555615885
Side View
Table 59.0%Crown 34.91°Girdle: THN-THKPavilion 40.12°Culet: NoneDepth 59.8%

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: £2,201 GBP|Low: £1,519 GBP|High: £3,636 GBP|Avg: £2,414 GBP|-3.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Wholesale Diamonds Direct
November 2, 2026
Retailer 10£1,519 GBP
Retailer 3£1,878 GBP
Retailer 4£2,004 GBP
Retailer 7£2,102 GBP
Retailer 1£2,201 GBP
Retailer 5£2,220 GBP
Retailer 2£2,353 GBP
Retailer 6£2,609 GBP
Retailer 9£2,693 GBP
Retailer 8£2,965 GBP
Wholesale Diamonds Direct£3,499 GBP

20 data points across 11 retailers

7 retailers£2,004 GBP to £2,353 GBP

Retailer 1
-
£1,878 GBP
SGD 3,400 SGD
Price last confirmed 13 days ago
A
Retailer 2
-
£2,004 GBP
$2,685 USD
View
A
Retailer 3
-
£2,102 GBP
$2,817 USD
View
A
Retailer 4
-
£2,201 GBP
View
A
Retailer 5
-
£2,220 GBP
SGD 4,020 SGD
View
A
Retailer 6
-
£2,353 GBP
$3,153 USD
View
Most Expensive
Wholesale Diamonds Direct
419410307 · Oct 14
£3,499 GBP
$4,688 USD
View
Price last confirmed 18 days ago
6 more retailers have this diamond
Prices start from £2,004 GBPSave up to £349 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
£2,004 GBP