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Heart|Natural|GIA

1.51ct I SI2 Heart Natural Diamond

EX • I/SI2 • GIA 5546346351

Certificate GIA 5546346351

Diamond specifications and retailer prices

From £1,803 GBP
HK$18,900 HKD
As of November 1, 2026
Save £2,165 GBP (55%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £4,713 GBP at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

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 5546346351. Listed at 15 retailers as of November 1, 2026, with a 120% 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
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5546346351
Dimensions7.01 × 7.97 × 4.70 mm
L/W Ratio1.14
Top View
7.01 mm7.97 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 5546346351
Side View
Table 63.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 58.9%

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: Nov 1
Current: £1,942 GBP|Low: £1,793 GBP|High: £4,579 GBP|Avg: £2,602 GBP|-12.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 4£1,803 GBP
Retailer 1£1,942 GBP
Retailer 5£2,068 GBP
Retailer 2£2,479 GBP
Retailer 6£2,479 GBP
Retailer 8£2,513 GBP
Retailer 9£2,531 GBP
Retailer 7£2,549 GBP
Retailer 3£3,967 GBP

46 data points across 9 retailers

15 retailers£1,803 GBP to £3,967 GBP

A
Cheapest Retailer
-
£1,803 GBP
HK$18,900 HKD
A
Retailer 2
-
£1,942 GBP
₹248,149 INR
View
A
Retailer 3
-
£2,068 GBP
SGD 3,750 SGD
View
A
Retailer 4
-
£2,479 GBP
View
A
Retailer 5
-
£2,479 GBP
$3,327 USD
View
A
Retailer 6
-
£2,513 GBP
SGD 4,557 SGD
View
A
Retailer 7
-
£2,531 GBP
$3,396 USD
View
A
Retailer 8
-
£2,549 GBP
$3,420 USD
View
A
Retailer 9
-
£2,673 GBP
A$5,518 AUD
View
Retailer 10
-
£2,706 GBP
$3,631 USD
View
Price last confirmed 25 days ago
Retailer 11
-
£2,706 GBP
$3,631 USD
View
Price last confirmed 25 days ago
Retailer 12
-
£2,809 GBP
$3,770 USD
View
Price last confirmed 32 days ago
Retailer 13
-
£3,122 GBP
$4,189 USD
View
Price last confirmed 34 days ago
B+
Retailer 14
-
£3,967 GBP
View
Most Expensive
NZ Jewellers
d05267e3-2d78-42de-92fb-73038f7076f7 · Sep 30
£4,713 GBP
$6,325 USD
View
Price last confirmed 33 days ago
14 more retailers have this diamond
Prices start from £1,803 GBPSave up to £2,165 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
£1,803 GBP