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Heart|Natural|GIA

1.51ct H SI1 Heart Natural Diamond

VG • H/SI1 • GIA 5231997262

Certificate GIA 5231997262

Diamond specifications and retailer prices

From $5,436 AUD
$3,810 USD
As of November 1, 2026
Save $5,915 AUD (52%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $13,798 AUD at NZ Jewellers · As of September 25, 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 SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 5231997262. Listed at 18 retailers as of November 1, 2026, with a 109% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
H
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5231997262
Dimensions6.95 × 7.95 × 4.68 mm
L/W Ratio1.14
Girdle conditionFaceted
Top View
6.95 mm7.95 mm1.51 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5231997262
Side View
Table 59.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 58.8%

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: $6,209 AUD|Low: $5,370 AUD|High: $12,640 AUD|Avg: $7,306 AUD|-5.9%
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
Retailer 14
Retailer 15
Retailer 16
November 2, 2026
Retailer 15$5,436 AUD
Retailer 11$5,443 AUD
Retailer 14$5,750 AUD
Retailer 12$5,959 AUD
Retailer 6$6,096 AUD
Retailer 7$6,107 AUD
Retailer 4$6,127 AUD
Retailer 1$6,209 AUD
Retailer 3$6,471 AUD
Retailer 10$6,564 AUD
Retailer 2$6,833 AUD
Retailer 13$7,088 AUD
Retailer 8$8,059 AUD
Retailer 16$8,761 AUD
Retailer 9$11,351 AUD
Retailer 5$11,388 AUD

25 data points across 16 retailers

18 retailers$5,436 AUD to $11,351 AUD

A
Cheapest Retailer
-
$5,436 AUD
$3,810 USD
A
Retailer 2
-
$5,443 AUD
HK$29,800 HKD
View
A
Retailer 3
-
$5,750 AUD
$4,030 USD
View
A
Retailer 4
-
$5,959 AUD
$4,176 USD
View
Final sale: no returns
A
Retailer 5
-
$6,096 AUD
$4,272 USD
View
A
Retailer 6
-
$6,107 AUD
$4,280 USD
View
A
Retailer 7
-
$6,127 AUD
$4,294 USD
View
A
Retailer 8
-
$6,209 AUD
€4,144 EUR
View
B+
Retailer 9
-
$6,471 AUD
$4,535 USD
View
B+
Retailer 10
-
$6,564 AUD
$4,600 USD
View
B+
Retailer 11
-
$6,833 AUD
$4,789 USD
View
B+
Retailer 12
-
$7,088 AUD
£3,911 GBP
View
Retailer 13
-
$8,059 AUD
View
Price last confirmed 24 days ago
B
Retailer 14
-
$8,132 AUD
View
B+
Retailer 15
-
$8,761 AUD
ZAR 99,190 ZAR
View
B
Retailer 16
-
$11,351 AUD
£6,264 GBP
View
Retailer 17
-
$11,388 AUD
$7,981 USD
View
Price last confirmed 7 days ago
Most Expensive
NZ Jewellers
a7f576fe-f550-4bb9-97c3-38e66aeea21e · Sep 25
$13,798 AUD
$9,670 USD
View
Price last confirmed 38 days ago
17 more retailers have this diamond
Prices start from $5,436 AUDSave up to $5,915 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
$5,436 AUD