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Heart|Natural|GIA

1.50ct I SI1 Heart Natural Diamond

ID • I/SI1 • GIA 5241019812

Certificate GIA 5241019812

Diamond specifications and retailer prices

From £2,178 GBP
HK$22,800 HKD
As of November 1, 2026
Save £2,899 GBP (57%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £5,956 GBP at NZ Jewellers · As of September 25, 2026
View at NZ Jewellers

About this 1.5ct natural heart diamond

This 1.5ct natural heart sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5241019812. Listed at 14 retailers as of November 1, 2026, with a 133% 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

1.50
Carat
I
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5241019812
Dimensions6.52 × 7.77 × 4.94 mm
L/W Ratio1.19
Girdle conditionFaceted
Top View
6.52 mm7.77 mm1.50 ctI / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5241019812
Side View
Table 59.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 63.5%

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: £2,665 GBP|Low: £2,178 GBP|High: £5,343 GBP|Avg: £3,325 GBP|-8.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 6£2,178 GBP
Retailer 8£2,544 GBP
Retailer 1£2,665 GBP
Retailer 3£2,792 GBP
Retailer 10£2,802 GBP
Retailer 9£2,806 GBP
Retailer 12£2,933 GBP
Retailer 5£3,306 GBP
Retailer 4£3,545 GBP
Retailer 11£3,790 GBP
Retailer 2£4,689 GBP
Retailer 7£5,078 GBP

29 data points across 12 retailers

14 retailers£2,178 GBP to £5,078 GBP

A
Cheapest Retailer
-
£2,178 GBP
HK$22,800 HKD
A
Retailer 2
-
£2,544 GBP
€3,246 EUR
View
A
Retailer 3
-
£2,665 GBP
$3,571 USD
View
A
Retailer 4
-
£2,792 GBP
SGD 5,056 SGD
View
A
Retailer 5
-
£2,802 GBP
$3,755 USD
View
Final sale: no returns
A
Retailer 6
-
£2,806 GBP
View
A
Retailer 7
-
£2,933 GBP
$3,930 USD
View
A
Retailer 8
-
£3,306 GBP
$4,430 USD
View
B+
Retailer 9
-
£3,429 GBP
A$7,068 AUD
View
Retailer 10
-
£3,545 GBP
A$7,307 AUD
View
Price last confirmed 23 days ago
B+
Retailer 11
-
£3,790 GBP
ZAR 82,049 ZAR
View
B+
Retailer 12
-
£4,689 GBP
$6,283 USD
View
B
Retailer 13
-
£5,078 GBP
View
Most Expensive
NZ Jewellers
866873ad-59aa-4b49-ba40-dce63a4157de · Sep 25
£5,956 GBP
$7,981 USD
View
Price last confirmed 37 days ago
13 more retailers have this diamond
Prices start from £2,178 GBPSave up to £2,899 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
1.50ct Heart
£2,178 GBP