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Heart|Natural|GIA

1.51ct G SI1 Heart Natural Diamond

EX • G/SI1 • GIA 6541424633

Certificate GIA 6541424633

Diamond specifications and retailer prices

From $6,173 AUD
HK$33,800 HKD
As of November 2, 2026
Save $7,300 AUD (54%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $13,730 AUD at NZ Jewellers · As of October 18, 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 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 6541424633. Listed at 21 retailers as of October 28, 2026, with a 118% 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6541424633
Dimensions8.03 × 7.35 × 4.73 mm
L/W Ratio1.09
Top View
8.03 mm7.35 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6541424633
Side View
Table 63.0%CrownGirdle: MED-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 2
Current: $6,597 AUD|Low: $6,155 AUD|High: $13,528 AUD|Avg: $8,662 AUD|-3.0%
Retailer 1
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 6$6,173 AUD
Retailer 1$6,597 AUD
Retailer 3$6,930 AUD
Retailer 4$7,324 AUD
Retailer 9$7,528 AUD
Retailer 5$7,911 AUD
Retailer 10$7,958 AUD
Retailer 2$8,254 AUD
Retailer 8$8,378 AUD
Retailer 7$9,228 AUD
Retailer 12$10,091 AUD
Retailer 11$12,094 AUD
Retailer 13$13,473 AUD

27 data points across 13 retailers

21 retailers$6,173 AUD to $13,473 AUD

A
Cheapest Retailer
-
$6,173 AUD
HK$33,800 HKD
A
Retailer 2
-
$6,597 AUD
₹440,289 INR
View
A
Retailer 3
-
$6,930 AUD
$4,857 USD
View
A
Retailer 4
-
$7,324 AUD
SGD 6,936 SGD
View
B+
Retailer 5
-
$7,528 AUD
$5,276 USD
View
Final sale: no returns
B+
Retailer 6
-
$7,615 AUD
$5,337 USD
View
B+
Retailer 7
-
$7,620 AUD
$5,340 USD
View
Retailer 8
-
$7,911 AUD
SGD 7,492 SGD
View
Price last confirmed 18 days ago
B+
Retailer 9
-
$7,958 AUD
£4,391 GBP
View
B+
Retailer 10
-
$7,975 AUD
View
Retailer 11
-
$8,209 AUD
$5,753 USD
View
Price last confirmed 17 days ago
Retailer 12
-
$8,209 AUD
$5,753 USD
View
Price last confirmed 15 days ago
Retailer 13
-
$8,209 AUD
$5,753 USD
View
Price last confirmed 16 days ago
Retailer 14
-
$8,254 AUD
View
Price last confirmed 15 days ago
B+
Retailer 15
-
$8,378 AUD
$5,871 USD
View
B+
Retailer 16
-
$9,228 AUD
€6,159 EUR
View
Retailer 17
-
$9,472 AUD
$6,638 USD
View
Price last confirmed 14 days ago
B+
Retailer 18
-
$10,091 AUD
ZAR 114,248 ZAR
View
B
Retailer 19
-
$12,094 AUD
£6,674 GBP
View
B
Retailer 20
-
$13,473 AUD
£7,435 GBP
View
Most Expensive
NZ Jewellers
59a2ea00-26f5-4f7a-b541-460bf1524131 · Oct 18
$13,730 AUD
$9,622 USD
View
Price last confirmed 15 days ago
20 more retailers have this diamond
Prices start from $6,173 AUDSave up to $7,300 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.

A
1.51ct Heart
$6,173 AUD