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Heart|Natural|GIA

1.51ct D SI2 Heart Natural Diamond

EX • D/SI2 • GIA 1236656907

Certificate GIA 1236656907

Diamond specifications and retailer prices

From $9,527 AUD
$6,692 USD
As of October 30, 2026
Save $5,780 AUD (38%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $18,270 AUD 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 D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1236656907. Listed at 9 retailers as of October 29, 2026, with a 61% 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
D
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1236656907
Dimensions6.94 × 8.15 × 4.51 mm
L/W Ratio1.17
Top View
6.94 mm8.15 mm1.51 ctD / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 1236656907
Side View
Table 59.0%CrownGirdlePavilionCulet: NoneDepth 55.3%

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: Oct 30
Current: $18,270 AUD|Low: $7,035 AUD|High: $18,270 AUD|Avg: $11,628 AUD
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
October 30, 2026
Retailer 5$7,035 AUD
Retailer 12$9,527 AUD
Retailer 7$10,083 AUD
Retailer 4$10,177 AUD
Retailer 6$10,276 AUD
Retailer 2$10,324 AUD
Retailer 9$10,923 AUD
Retailer 8$11,091 AUD
Retailer 3$11,787 AUD
Retailer 11$12,605 AUD
Retailer 13$13,123 AUD
Retailer 10$15,306 AUD
NZ Jewellers$18,270 AUD

17 data points across 13 retailers

9 retailers$9,527 AUD to $15,306 AUD

B+
Cheapest Retailer
-
$9,527 AUD
$6,692 USD
B+
Retailer 2
-
$10,083 AUD
$7,083 USD
View
B+
Retailer 3
-
$10,276 AUD
£5,684 GBP
View
B+
Retailer 4
-
$10,324 AUD
£5,710 GBP
View
B+
Retailer 5
-
$10,923 AUD
$7,673 USD
View
B
Retailer 6
-
$11,091 AUD
$7,791 USD
View
Retailer 7
-
$12,605 AUD
$8,854 USD
View
Price last confirmed 11 days ago
B
Retailer 8
-
$15,306 AUD
£8,466 GBP
View
Most Expensive
NZ Jewellers
4d10a256-f519-45c9-b7a5-dd871cc9cfb4 · Oct 21
$18,270 AUD
$12,834 USD
View
Price last confirmed 11 days ago
8 more retailers have this diamond
Prices start from $9,527 AUDSave up to $5,780 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.

B+
1.51ct Heart
$9,527 AUD