Heart|Natural|GIA

1.51ct F SI1 Heart Natural Diamond

ID • F/SI1 • GIA 5553228913

Certificate GIA 5553228913

Diamond specifications and retailer prices

From $4,878 USD
As of November 1, 2026
Save $3,614 USD (43%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $9,938 USD at NZ Jewellers · As of September 30, 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 F 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 5553228913. Listed at 20 retailers as of November 1, 2026, with a 74% 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
F
Color
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle37°
Pavilion angle43.22°
OriginNatural
Grading LabGIA
CertificateGIA 5553228913
Dimensions7.94 × 6.77 × 4.82 mm
L/W Ratio1.17
Top View
7.94 mm6.77 mm1.51 ctF / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5553228913
Side View
Table 59.0%Crown 37°Girdle: Slightly ThickPavilion 43.22°Culet: NoneDepth 60.7%

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: Nov 1
Current: $6,298 USD|Low: $4,305 USD|High: $8,860 USD|Avg: $6,269 USD|-0.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 12$4,878 USD
Retailer 11$5,028 USD
Retailer 9$5,236 USD
Retailer 2$5,321 USD
Retailer 8$5,385 USD
Retailer 5$5,624 USD
Retailer 6$5,920 USD
Retailer 4$5,942 USD
Retailer 3$5,952 USD
Retailer 1$6,298 USD
Retailer 10$7,083 USD
Retailer 7$8,492 USD

42 data points across 12 retailers

20 retailers$4,878 USD to $8,492 USD

A
Cheapest Retailer
-
$4,878 USD
A
Retailer 2
-
$5,028 USD
View
A
Retailer 3
-
$5,236 USD
View
B+
Retailer 4
-
$5,321 USD
View
Final sale: no returns
B+
Retailer 5
-
$5,385 USD
View
B+
Retailer 6
-
$5,624 USD
£4,428 GBP
View
B+
Retailer 7
-
$5,920 USD
View
Retailer 8
-
$5,942 USD
View
Price last confirmed 32 days ago
Retailer 9
-
$5,942 USD
View
Price last confirmed 32 days ago
Retailer 10
-
$5,942 USD
View
Price last confirmed 49 days ago
Retailer 11
-
$5,942 USD
View
Price last confirmed 17 days ago
Retailer 12
-
$5,952 USD
A$9,156 AUD
View
Price last confirmed 23 days ago
B+
Retailer 13
-
$6,093 USD
View
B+
Retailer 14
-
$6,298 USD
€5,998 EUR
View
Retailer 15
-
$6,856 USD
View
Price last confirmed 57 days ago
Retailer 16
-
$6,856 USD
View
Price last confirmed 34 days ago
Retailer 17
-
$6,856 USD
View
Price last confirmed 48 days ago
B+
Retailer 18
-
$7,083 USD
ZAR 114,423 ZAR
View
B
Retailer 19
-
$8,492 USD
£6,687 GBP
View
Most Expensive
NZ Jewellers
5c00d538-971f-4924-a6de-5e7610e26984 · Sep 30
$9,938 USD
View
Price last confirmed 33 days ago
19 more retailers have this diamond
Prices start from $4,878 USDSave up to $3,614 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
$4,878 USD