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Marquise|Natural|GIA

0.80ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 6541502138

Certificate GIA 6541502138

Diamond specifications and retailer prices

From $1,510 AUD
$1,058 USD
As of November 2, 2026
Save $577 AUD (28%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $2,416 AUD at Cape Diamonds · As of October 26, 2026
View at Cape Diamonds

About this 0.8ct natural marquise diamond

This 0.8ct natural marquise sits in the just-under-one-carat band, graded I 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 6541502138. Listed at 9 retailers as of October 31, 2026, with a 38% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

0.80
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle36.52°
Pavilion angle42.11°
OriginNatural
Grading LabGIA
CertificateGIA 6541502138
Dimensions9.16 × 4.84 × 3.10 mm
L/W Ratio1.89
Top View
9.16 mm4.84 mm0.80 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6541502138
Side View
Table 61.0%Crown 36.52°Girdle: MED-VTKPavilion 42.11°Culet: NoneDepth 64.1%

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 2
Current: $2,416 AUD|Low: $1,421 AUD|High: $2,490 AUD|Avg: $1,926 AUD|-1.6%
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 6$1,510 AUD
Retailer 2$1,541 AUD
Retailer 5$1,570 AUD
Retailer 7$1,570 AUD
Retailer 4$1,852 AUD
Retailer 3$2,064 AUD
Retailer 8$2,087 AUD
Retailer 9$2,197 AUD
Cape Diamonds$2,416 AUD

30 data points across 9 retailers

9 retailers$1,510 AUD to $2,087 AUD

A
Cheapest Retailer
-
$1,510 AUD
$1,058 USD
Final sale: no returns
B+
Retailer 2
-
$1,541 AUD
$1,080 USD
View
A
Retailer 3
-
$1,570 AUD
$1,100 USD
View
A
Retailer 4
-
$1,570 AUD
$1,100 USD
View
A
Retailer 5
-
$1,852 AUD
£1,022 GBP
View
A
Retailer 6
-
$2,064 AUD
£1,139 GBP
View
B+
Retailer 7
-
$2,087 AUD
$1,463 USD
View
Retailer 8
-
$2,197 AUD
View
Price last confirmed 28 days ago
Most Expensive
Cape Diamonds
cert_6541502138 · Oct 26
$2,416 AUD
ZAR 27,351 ZAR
View
Price last confirmed 7 days ago
8 more retailers have this diamond
Prices start from $1,510 AUDSave up to $577 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
0.80ct Marquise
$1,510 AUD