CaratHunter
Plans
Heart|Natural|GIA

1.57ct G SI1 Heart Natural Diamond

EX • G/SI1 • GIA 1553558198

Certificate GIA 1553558198

Diamond specifications and retailer prices

From $6,379 AUD
As of November 4, 2026
Save $1,204 AUD (16%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $7,583 AUD at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 1.57ct natural heart diamond

This 1.57ct natural heart sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1553558198. Listed at 7 retailers as of November 4, 2026, with prices from $6,379 to $7,583, a $1,204 spread on the same certified stone. Blue Nile lists it at $7,583. 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

1.57
Carat
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1553558198
Dimensions6.94 × 8.20 × 4.82 mm
L/W Ratio1.18
Culet sizeNone
Key to symbols
Cloud, Crystal, Feather, Needle, Indented Natural, Natural
Top View
6.94 mm8.20 mm1.57 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1553558198
Side View
Table 61.0%CrownGirdle: STK-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 4
Current: $7,583 AUD|Low: $5,803 AUD|High: $10,389 AUD|Avg: $7,348 AUD|-11.5%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 5$6,379 AUD
Retailer 2$6,501 AUD
Retailer 4$6,596 AUD
Retailer 7$6,717 AUD
Retailer 3$6,739 AUD
Retailer 6$6,885 AUD
Blue Nile$7,583 AUD
Retailer 8$9,507 AUD

33 data points across 8 retailers

7 retailers$6,379 AUD to $7,583 AUD

A
Cheapest Retailer
-
$6,379 AUD
A
Retailer 2
-
$6,501 AUD
View
A
Retailer 3
-
$6,596 AUD
View
Final sale: no returns
A
Retailer 4
-
$6,717 AUD
View
A
Retailer 5
-
$6,739 AUD
View
A
Retailer 6
-
$6,885 AUD
View
Most Expensive
A
Blue Nile
29484961 · Nov 5
$7,583 AUD
$5,210 USD
View
6 more retailers have this diamond
Prices start from $6,379 AUDSave up to $1,204 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
1.57ct Heart
$6,379 AUD