Heart|Natural|GIA

1.51ct I SI1 Heart Natural Diamond

VG • I/SI1 • GIA 1439777400

Certificate GIA 1439777400

Diamond specifications and retailer prices

From $2,688 USD
As of November 6, 2026
Save $3,435 USD (56%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $6,123 USD at MOH London · As of November 4, 2026
View at MOH London

About this 1.51ct natural heart diamond

This 1.51ct natural heart sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 1439777400. Listed at 16 retailers as of November 4, 2026, with prices from $2,688 to $6,123, a $3,435 spread on the same certified stone. MOH London lists it at $6,123. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
I
Color
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.26°
Pavilion angle55.01°
OriginNatural
Grading LabGIA
CertificateGIA 1439777400
Dimensions6.39 × 6.34 × 4.43 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Feather, Crystal, Needle
Top View
6.39 mm6.34 mm1.51 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1439777400
Side View
Table 62.0%Crown 42.26°Girdle: MED-STKPavilion 55.01°Culet: NoneDepth 69.8%

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 6
Current: $6,123 USD|Low: $2,688 USD|High: $6,213 USD|Avg: $3,921 USD|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 10$2,688 USD
Retailer 8$3,077 USD
Retailer 11$3,388 USD
Retailer 2$3,446 USD
Retailer 4$3,464 USD
Retailer 6$3,745 USD
Retailer 9$3,801 USD
Retailer 3$3,932 USD
Retailer 5$4,273 USD
Retailer 7$4,481 USD
MOH London$6,123 USD

34 data points across 11 retailers

16 retailers$2,688 USD to $6,123 USD

A
Cheapest Retailer
-
$2,688 USD
A
Retailer 2
-
$3,077 USD
View
A
Retailer 3
-
$3,234 USD
View
A
Retailer 4
-
$3,259 USD
View
B+
Retailer 5
-
$3,388 USD
View
Final sale: no returns
B+
Retailer 6
-
$3,446 USD
View
A
Retailer 7
-
$3,464 USD
View
B+
Retailer 8
-
$3,520 USD
View
B+
Retailer 9
-
$3,745 USD
View
A
Retailer 10
-
$3,801 USD
View
B+
Retailer 11
-
$3,816 USD
View
Retailer 12
-
$3,932 USD
View
Price last confirmed 30 days ago
B+
Retailer 13
-
$4,273 USD
View
B+
Retailer 14
-
$4,481 USD
View
B
Retailer 15
-
$5,208 USD
View
Most Expensive
B
MOH London
C664DE5D8 · Nov 4
$6,123 USD
£4,821 GBP
View
15 more retailers have this diamond
Prices start from $2,688 USDSave up to $3,435 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
$2,688 USD