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Heart|Natural|GIA

1.51ct K SI1 Heart Natural Diamond

EX • K/SI1 • GIA 2557604008

Certificate GIA 2557604008

Diamond specifications and retailer prices

From $3,841 AUD
As of November 6, 2026
Save $1,436 AUD (27%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $5,277 AUD at GemTrove · As of November 6, 2026
View at GemTrove

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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2557604008. Listed at 8 retailers as of November 6, 2026, with prices from $3,841 to $5,277, a $1,436 spread on the same certified stone. GemTrove lists it at $5,277. 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

1.51
Carat
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2557604008
Dimensions7.02 × 8.11 × 4.76 mm
L/W Ratio1.16
Culet sizeNone
Key to symbols
Feather, Crystal, Needle, Pinpoint
Top View
7.02 mm8.11 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2557604008
Side View
Table 57.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 58.7%

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: Nov 6
Current: $3,841 AUD|Low: $3,459 AUD|High: $5,306 AUD|Avg: $4,304 AUD|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 1$3,841 AUD
Retailer 4$3,873 AUD
Retailer 3$3,916 AUD
Retailer 7$3,973 AUD
Retailer 2$4,158 AUD
Retailer 6$4,487 AUD
Retailer 5$4,609 AUD

42 data points across 7 retailers

8 retailers$3,841 AUD to $5,277 AUD

A
Cheapest Retailer
-
$3,841 AUD
A
Retailer 2
-
$3,873 AUD
View
A
Retailer 3
-
$3,916 AUD
View
Final sale: no returns
A
Retailer 4
-
$3,973 AUD
View
A
Retailer 5
-
$4,158 AUD
View
A
Retailer 6
-
$4,487 AUD
View
A
Retailer 7
-
$4,609 AUD
View
Most Expensive
B+
GemTrove
GT-N-01269485-98 · Nov 6
$5,277 AUD
View
7 more retailers have this diamond
Prices start from $3,841 AUDSave up to $1,436 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
$3,841 AUD