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Heart|Natural|GIA

1.51ct F SI1 Heart Natural Diamond

FR • F/SI1 • GIA 1545335980

Certificate GIA 1545335980

Diamond specifications and retailer prices

From $5,156 AUD
SGD 4,883 SGD
As of October 31, 2026
Save $6,980 AUD (58%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $12,744 AUD at NZ Jewellers · As of October 18, 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 standard cut grade stated by the retailer rather than the lab and certified by GIA 1545335980. Listed at 7 retailers as of October 31, 2026, with a 135% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
F
Colour
SI1
Clarity
Fair
Cut (retailer stated)

Specifications

Cut (retailer stated)Fair
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1545335980
Dimensions7.51 × 6.69 × 4.86 mm
L/W Ratio1.12
Key to symbols
Feather, Indented Natural
Top View
7.51 mm6.69 mm1.51 ctF / SI1
OriginNatural
CutFair
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1545335980
Side View
Table 59.0%CrownGirdle: Very ThickPavilionCulet: NDepth 64.7%

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: Oct 31
Current: $12,136 AUD|Low: $4,565 AUD|High: $12,984 AUD|Avg: $7,860 AUD|-5.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 3$5,156 AUD
Retailer 10$6,317 AUD
Retailer 2$6,514 AUD
Retailer 8$6,759 AUD
Retailer 4$7,033 AUD
Retailer 9$7,148 AUD
Retailer 7$7,550 AUD
Retailer 5$7,604 AUD
Retailer 6$10,411 AUD
Retailer 1$12,136 AUD

25 data points across 10 retailers

7 retailers$5,156 AUD to $12,136 AUD

A
Cheapest Retailer
-
$5,156 AUD
SGD 4,883 SGD
B+
Retailer 2
-
$7,033 AUD
$4,929 USD
View
B+
Retailer 3
-
$7,604 AUD
$5,329 USD
View
Retailer 4
-
$7,620 AUD
$5,340 USD
View
Price last confirmed 17 days ago
Retailer 5
-
$7,620 AUD
$5,340 USD
View
Price last confirmed 15 days ago
C
Retailer 6
-
$12,136 AUD
£6,697 GBP
View
Most Expensive
NZ Jewellers
d14b72df-1e22-4eab-a89e-616233642b41 · Oct 18
$12,744 AUD
$8,931 USD
View
Price last confirmed 16 days ago
6 more retailers have this diamond
Prices start from $5,156 AUDSave up to $6,980 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
$5,156 AUD