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Heart|Natural|GIA

1.51ct H SI1 Heart Natural Diamond

EX • H/SI1 • GIA 7546607780

Certificate GIA 7546607780

Diamond specifications and retailer prices

From $4,062 USD
As of November 1, 2026
Save $4,464 USD (52%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $9,670 USD 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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7546607780. Listed at 21 retailers as of November 1, 2026, with a 110% 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
H
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 7546607780
Dimensions6.80 × 7.95 × 4.72 mm
L/W Ratio1.17
Girdle conditionFaceted
Top View
6.80 mm7.95 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7546607780
Side View
Table 59.0%CrownGirdle: MED-THKPavilion 41.2°Culet: NoneDepth 59.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $4,623 USD|Low: $4,012 USD|High: $9,065 USD|Avg: $5,462 USD|-4.0%
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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 2, 2026
Retailer 2$4,062 USD
Retailer 14$4,083 USD
Retailer 18$4,306 USD
Retailer 16$4,476 USD
Retailer 7$4,555 USD
Retailer 8$4,600 USD
Retailer 5$4,607 USD
Retailer 1$4,623 USD
Retailer 4$4,858 USD
Retailer 12$4,980 USD
Retailer 13$5,133 USD
Retailer 17$5,223 USD
Retailer 9$5,506 USD
Retailer 10$5,648 USD
Retailer 3$6,623 USD
Retailer 15$6,710 USD
Retailer 11$8,526 USD
Retailer 6$8,548 USD

25 data points across 18 retailers

21 retailers$4,062 USD to $8,526 USD

A
Cheapest Retailer
-
$4,062 USD
A
Retailer 2
-
$4,083 USD
HK$31,900 HKD
View
A
Retailer 3
-
$4,306 USD
View
B+
Retailer 4
-
$4,476 USD
View
Final sale: no returns
A
Retailer 5
-
$4,555 USD
View
A
Retailer 6
-
$4,600 USD
View
A
Retailer 7
-
$4,607 USD
View
A
Retailer 8
-
$4,623 USD
€4,403 EUR
View
B+
Retailer 9
-
$4,858 USD
View
B+
Retailer 10
-
$4,980 USD
View
B+
Retailer 11
-
$5,133 USD
View
Retailer 12
-
$5,167 USD
View
Price last confirmed 12 days ago
B+
Retailer 13
-
$5,223 USD
£4,113 GBP
View
B+
Retailer 14
-
$5,506 USD
SGD 7,441 SGD
View
Retailer 15
-
$5,648 USD
A$8,689 AUD
View
Price last confirmed 24 days ago
B
Retailer 16
-
$5,946 USD
A$9,148 AUD
View
B+
Retailer 17
-
$6,623 USD
ZAR 107,001 ZAR
View
B+
Retailer 18
-
$6,710 USD
View
B
Retailer 19
-
$8,526 USD
£6,713 GBP
View
Retailer 20
-
$8,548 USD
View
Price last confirmed 10 days ago
Most Expensive
NZ Jewellers
dbf135a3-0579-43ef-9381-30a46e39cd96 · Sep 25
$9,670 USD
View
Price last confirmed 38 days ago
20 more retailers have this diamond
Prices start from $4,062 USDSave up to $4,464 USD

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
$4,062 USD