Heart|Natural|GIA

1.51ct G SI1 Heart Natural Diamond

EX • G/SI1 • GIA 6481518557

Certificate GIA 6481518557

Diamond specifications and retailer prices

From $9,497 AUD

$6,656 USD

As of November 1, 2026

Save $7,256 AUD (43%) vs most expensive(unlock to see where)

19 retailers carry this diamond

Most expensive: $16,753 AUD at MOH London · As of November 2, 2026

View at MOH London

About this 1.51ct natural heart diamond

This 1.51ct natural heart sits in the one-and-a-half to two carat band, graded G 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 6481518557. Listed at 19 retailers as of November 1, 2026, with prices from $9,497 to $16,753, a $7,256 spread on the same certified stone. MOH London lists it at $16,753. 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

SI1

Clarity

Excellent

Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

OriginNatural

Grading LabGIA

CertificateGIA 6481518557

Dimensions7.15 × 6.78 × 4.48 mm

L/W Ratio1.05

View GIA Report →View Loupe360 Video →

Top View

OriginNatural

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateGIA 6481518557

Side View

Caratlytics Score

How it works →

B+

Very Good

Strong quality and value balance

Unlock full score analysis

See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1

Current: $16,753 AUD|Low: $9,215 AUD|High: $16,955 AUD|Avg: $12,082 AUD|-1.2%

MOH London

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

Retailer 11

Retailer 12

Retailer 13

November 2, 2026

Retailer 4$9,497 AUD

Retailer 12$10,051 AUD

Retailer 3$10,053 AUD

Retailer 5$10,053 AUD

Retailer 13$10,137 AUD

Retailer 2$11,326 AUD

Retailer 7$11,349 AUD

Retailer 11$11,526 AUD

Retailer 10$11,530 AUD

Retailer 6$13,131 AUD

Retailer 8$14,768 AUD

Retailer 9$16,599 AUD

MOH London$16,753 AUD

34 data points across 13 retailers

19 retailers$9,497 AUD to $16,753 AUD

B+

Cheapest Retailer

$9,497 AUD

$6,656 USD

B+

Retailer 2

$9,553 AUD

$6,695 USD

View

B+

Retailer 3

$10,051 AUD

$7,044 USD

View

Final sale: no returns

B+

Retailer 4

$10,053 AUD

$7,045 USD

View

Retailer 5

$10,053 AUD

$7,045 USD

View

Price last confirmed 26 days ago

B+

Retailer 6

$10,137 AUD

$7,104 USD

View

B+

Retailer 7

$10,707 AUD

$7,503 USD

View

B+

Retailer 8

$11,326 AUD

£6,250 GBP

View

B+

Retailer 9

$11,349 AUD

£6,263 GBP

View

Retailer 10

$11,526 AUD

$8,078 USD

View

Retailer 11

$11,530 AUD

View

Price last confirmed 12 days ago

Retailer 12

$11,558 AUD

$8,100 USD

View

Retailer 13

$11,558 AUD

$8,100 USD

View

Retailer 14

$11,943 AUD

$8,370 USD

View

Retailer 15

$12,102 AUD

$8,481 USD

View

Retailer 16

$13,131 AUD

€8,764 EUR

View

Retailer 17

$14,768 AUD

ZAR 167,201 ZAR

View

Retailer 18

$16,599 AUD

£9,160 GBP

View

Most Expensive

MOH London

7918798AC · Nov 2

$16,753 AUD

£9,245 GBP

View

18 more retailers have this diamond

Prices start from $9,497 AUDSave up to $7,256 AUD

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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B+

1.51ct Heart

$9,497 AUD