Heart|Natural|GIA

1.51ct H SI2 Heart Natural Diamond

ID • H/SI2 • GIA 2231913358

Certificate GIA 2231913358

Diamond specifications and retailer prices

From £2,685 GBP

$3,603 USD

As of November 1, 2026

Save £3,186 GBP (54%) vs most expensive(unlock to see where)

13 retailers carry this diamond

Most expensive: £6,360 GBP at NZ Jewellers · As of October 21, 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 H 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 2231913358. Listed at 13 retailers as of November 1, 2026, with a 119% 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

Colour

SI2

Clarity

Ideal

Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal

PolishExcellent

SymmetryExcellent

FluorescenceNone

OriginNatural

Grading LabGIA

CertificateGIA 2231913358

Dimensions6.60 × 7.79 × 4.80 mm

L/W Ratio1.18

Culet sizeNone

Key to symbols

Twinning Wisp, Cloud, Crystal, Feather, Needle

View GIA Report →View Loupe360 Video →

Top View

OriginNatural

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateGIA 2231913358

Side View

Caratlytics Score

How it works →

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: £6,360 GBP|Low: £2,544 GBP|High: £6,360 GBP|Avg: £3,808 GBP

NZ Jewellers

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

Retailer 11

Retailer 12

Retailer 13

Retailer 14

Retailer 15

November 2, 2026

Retailer 6£2,685 GBP

Retailer 12£2,822 GBP

Retailer 9£3,053 GBP

Retailer 10£3,307 GBP

Retailer 11£3,307 GBP

Retailer 13£3,307 GBP

Retailer 15£3,346 GBP

Retailer 7£3,735 GBP

Retailer 3£3,756 GBP

Retailer 14£3,756 GBP

Retailer 5£3,816 GBP

Retailer 4£3,882 GBP

Retailer 2£4,170 GBP

Retailer 8£5,870 GBP

NZ Jewellers£6,360 GBP

26 data points across 15 retailers

13 retailers£2,685 GBP to £5,870 GBP

Cheapest Retailer

£2,685 GBP

$3,603 USD

Retailer 2

£2,822 GBP

$3,787 USD

View

Retailer 3

£3,053 GBP

$4,097 USD

View

Final sale: no returns

Retailer 4

£3,307 GBP

$4,438 USD

View

Price last confirmed 11 days ago

Retailer 5

£3,307 GBP

$4,438 USD

View

Price last confirmed 11 days ago

B+

Retailer 6

£3,346 GBP

$4,490 USD

View

B+

Retailer 7

£3,756 GBP

$5,040 USD

View

B+

Retailer 8

£3,756 GBP

$5,040 USD

View

Retailer 9

£3,816 GBP

$5,121 USD

View

Price last confirmed 10 days ago

B+

Retailer 10

£3,882 GBP

$5,210 USD

View

B+

Retailer 11

£4,170 GBP

€5,330 EUR

View

Retailer 12

£5,870 GBP

View

Most Expensive

NZ Jewellers

e31a8be5-9c8e-44d7-bb7e-e2e4fc9652f5 · Oct 21

£6,360 GBP

$8,535 USD

View

Price last confirmed 12 days ago

12 more retailers have this diamond

Prices start from £2,685 GBPSave up to £3,186 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.

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1.51ct Heart

£2,685 GBP