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Heart|Natural|GIA

1.51ct K SI1 Heart Natural Diamond

GD • K/SI1 • GIA 6462181862

Certificate GIA 6462181862

Diamond specifications and retailer prices

From $4,266 AUD
As of November 6, 2026
Save $4,878 AUD (53%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $9,144 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6462181862. Listed at 10 retailers as of November 4, 2026, with prices from $4,266 to $9,144, a $4,878 spread on the same certified stone. MOH London lists it at $9,144. 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
K
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6462181862
Dimensions7.28 × 6.05 × 4.25 mm
L/W Ratio1.20
Top View
7.28 mm6.05 mm1.51 ctK / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6462181862
Side View
Table 53.0%CrownGirdle: ThickPavilionCulet: NoneDepth 70.2%

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: Nov 6
Current: $9,144 AUD|Low: $4,209 AUD|High: $9,279 AUD|Avg: $6,054 AUD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 5$4,266 AUD
Retailer 6$4,867 AUD
Retailer 8$5,247 AUD
Retailer 7$5,482 AUD
Retailer 4$5,676 AUD
Retailer 9$5,923 AUD
Retailer 2$6,382 AUD
Retailer 3$6,692 AUD
MOH London$9,144 AUD

41 data points across 9 retailers

10 retailers$4,266 AUD to $9,144 AUD

B+
Cheapest Retailer
-
$4,266 AUD
B+
Retailer 2
-
$4,867 AUD
View
B+
Retailer 3
-
$5,247 AUD
View
Retailer 4
-
$5,482 AUD
View
Price last confirmed 29 days ago
B+
Retailer 5
-
$5,676 AUD
View
B
Retailer 6
-
$5,694 AUD
View
B
Retailer 7
-
$5,923 AUD
View
B
Retailer 8
-
$6,382 AUD
View
B
Retailer 9
-
$6,692 AUD
View
Most Expensive
C
MOH London
BD868D2F7 · Nov 4
$9,144 AUD
£4,947 GBP
View
9 more retailers have this diamond
Prices start from $4,266 AUDSave up to $4,878 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.

B+
1.51ct Heart
$4,266 AUD