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Heart|Natural|GIA

1.51ct E SI1 Heart Natural Diamond

EX • E/SI1 • GIA 2436211625

Certificate GIA 2436211625

Diamond specifications and retailer prices

From $5,788 AUD
$4,066 USD
As of October 30, 2026
Save $6,949 AUD (55%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $12,737 AUD at Queensmith · As of October 28, 2026
View at Queensmith

About this 1.51ct natural heart diamond

This 1.51ct natural heart sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2436211625. Listed at 19 retailers as of October 28, 2026, with prices from $5,788 to $12,737, a $6,949 spread on the same certified stone. Queensmith lists it at $12,737. 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle38.11°
Pavilion angle31.22°
OriginNatural
Grading LabGIA
CertificateGIA 2436211625
Dimensions6.51 × 6.17 × 4.30 mm
L/W Ratio1.06
Top View
6.51 mm6.17 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2436211625
Side View
Table 60.0%Crown 38.11°Girdle: ThickPavilion 31.22°Culet: NoneDepth 69.7%

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: Oct 30
Current: $12,737 AUD|Low: $5,615 AUD|High: $12,782 AUD|Avg: $7,825 AUD|+2.5%
Queensmith
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
October 31, 2026
Retailer 5$5,788 AUD
Retailer 13$6,016 AUD
Retailer 14$6,124 AUD
Retailer 6$6,233 AUD
Retailer 4$6,271 AUD
Retailer 12$6,635 AUD
Retailer 7$6,874 AUD
Retailer 8$7,023 AUD
Retailer 2$7,312 AUD
Retailer 3$7,384 AUD
Retailer 10$8,277 AUD
Retailer 11$8,919 AUD
Retailer 9$11,728 AUD
Queensmith$12,737 AUD

35 data points across 14 retailers

19 retailers$5,788 AUD to $12,737 AUD

A
Cheapest Retailer
-
$5,788 AUD
$4,066 USD
A
Retailer 2
-
$6,016 AUD
$4,226 USD
View
A
Retailer 3
-
$6,124 AUD
$4,302 USD
View
Final sale: no returns
A
Retailer 4
-
$6,233 AUD
$4,378 USD
View
A
Retailer 5
-
$6,271 AUD
$4,405 USD
View
A
Retailer 6
-
$6,587 AUD
$4,627 USD
View
A
Retailer 7
-
$6,635 AUD
$4,661 USD
View
A
Retailer 8
-
$6,874 AUD
£3,802 GBP
View
A
Retailer 9
-
$7,023 AUD
$4,933 USD
View
A
Retailer 10
-
$7,161 AUD
$5,030 USD
View
A
Retailer 11
-
$7,161 AUD
$5,030 USD
View
A
Retailer 12
-
$7,312 AUD
£4,044 GBP
View
Retailer 13
-
$7,384 AUD
View
Price last confirmed 21 days ago
A
Retailer 14
-
$7,403 AUD
$5,200 USD
View
Retailer 15
-
$8,085 AUD
$5,679 USD
View
Price last confirmed 16 days ago
A
Retailer 16
-
$8,277 AUD
€5,537 EUR
View
B+
Retailer 17
-
$8,919 AUD
ZAR 101,217 ZAR
View
B+
Retailer 18
-
$11,728 AUD
£6,487 GBP
View
Most Expensive
B
Queensmith
2436211625 · Oct 28
$12,737 AUD
£7,045 GBP
View
18 more retailers have this diamond
Prices start from $5,788 AUDSave up to $6,949 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
$5,788 AUD