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Heart|Natural|GIA

1.51ct I SI1 Heart Natural Diamond

VG • I/SI1 • GIA 1439777400

Certificate GIA 1439777400

Diamond specifications and retailer prices

From $3,912 AUD
As of November 6, 2026
Save $4,999 AUD (56%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $8,911 AUD 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 $3,912 to $8,911, a $4,999 spread on the same certified stone. MOH London lists it at $8,911. 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
Colour
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: $8,911 AUD|Low: $3,912 AUD|High: $9,042 AUD|Avg: $5,707 AUD|-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$3,912 AUD
Retailer 8$4,478 AUD
Retailer 11$4,931 AUD
Retailer 2$5,015 AUD
Retailer 4$5,042 AUD
Retailer 6$5,450 AUD
Retailer 9$5,532 AUD
Retailer 3$5,723 AUD
Retailer 5$6,219 AUD
Retailer 7$6,522 AUD
MOH London$8,911 AUD

34 data points across 11 retailers

16 retailers$3,912 AUD to $8,911 AUD

A
Cheapest Retailer
-
$3,912 AUD
A
Retailer 2
-
$4,478 AUD
View
A
Retailer 3
-
$4,707 AUD
View
A
Retailer 4
-
$4,743 AUD
View
B+
Retailer 5
-
$4,931 AUD
View
Final sale: no returns
B+
Retailer 6
-
$5,015 AUD
View
A
Retailer 7
-
$5,042 AUD
View
B+
Retailer 8
-
$5,123 AUD
View
B+
Retailer 9
-
$5,450 AUD
View
A
Retailer 10
-
$5,532 AUD
View
B+
Retailer 11
-
$5,554 AUD
View
Retailer 12
-
$5,723 AUD
View
Price last confirmed 29 days ago
B+
Retailer 13
-
$6,219 AUD
View
B+
Retailer 14
-
$6,522 AUD
View
B
Retailer 15
-
$7,580 AUD
View
Most Expensive
B
MOH London
C664DE5D8 · Nov 4
$8,911 AUD
£4,821 GBP
View
15 more retailers have this diamond
Prices start from $3,912 AUDSave up to $4,999 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
$3,912 AUD