Heart|Natural|GIA

0.37ct D SI1 Heart Natural Diamond

EX • D/SI1 • GIA 6445393329

Certificate GIA 6445393329

Diamond specifications and retailer prices

From $552 USD
As of October 31, 2026
Save $456 USD (45%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $1,466 USD at MOH London · As of November 1, 2026
View at MOH London

About this 0.37ct natural heart diamond

This 0.37ct natural heart sits in the sub-half-carat band, graded D 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 6445393329. Listed at 17 retailers as of October 30, 2026, with a 83% 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

0.37
Carat
D
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle38.3°
Pavilion angle38.9°
OriginNatural
Grading LabGIA
CertificateGIA 6445393329
Dimensions4.20 × 5.00 × 2.96 mm
L/W Ratio1.19
Top View
4.20 mm5.00 mm0.37 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6445393329
Side View
Table 62.0%Crown 38.3°Girdle: THN-THKPavilion 38.9°Culet: NoneDepth 59.2%

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 31
Current: $1,466 USD|Low: $650 USD|High: $2,038 USD|Avg: $934 USD|-0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 1, 2026
Retailer 12$650 USD
Retailer 4$660 USD
Retailer 10$665 USD
Retailer 9$700 USD
Retailer 11$700 USD
Retailer 2$709 USD
Retailer 3$750 USD
Retailer 5$758 USD
Retailer 7$891 USD
Retailer 8$977 USD
Retailer 6$1,008 USD
MOH London$1,466 USD
Retailer 13$2,038 USD

39 data points across 13 retailers

17 retailers$552 USD to $1,008 USD

B+
Cheapest Retailer
-
$552 USD
B+
Retailer 2
-
$650 USD
View
B+
Retailer 3
-
$660 USD
View
B+
Retailer 4
-
$665 USD
View
B+
Retailer 5
-
$700 USD
View
B+
Retailer 6
-
$700 USD
View
B+
Retailer 7
-
$709 USD
£559 GBP
View
B
Retailer 8
-
$720 USD
View
B
Retailer 9
-
$720 USD
View
B
Retailer 10
-
$750 USD
View
B
Retailer 11
-
$750 USD
View
B
Retailer 12
-
$782 USD
View
B
Retailer 13
-
$891 USD
£701 GBP
View
Retailer 14
-
$977 USD
A$1,503 AUD
View
Price last confirmed 28 days ago
B
Retailer 15
-
$1,008 USD
ZAR 16,280 ZAR
View
Most Expensive
MOH London
E65116B3F · Nov 1
$1,466 USD
£1,154 GBP
View
Price under review
15 more retailers have this diamond
Prices start from $552 USDSave up to $456 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.

B+
0.37ct Heart
$552 USD