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Marquise|Natural|GIA

0.80ct E SI1 Marquise Natural Diamond

EX • E/SI1 • GIA 6551378239

Certificate GIA 6551378239

Diamond specifications and retailer prices

From $2,725 AUD
$1,914 USD
As of October 26, 2026
Save $1,725 AUD (39%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $6,305 AUD at NZ Jewellers · As of October 24, 2026
View at NZ Jewellers

About this 0.8ct natural marquise diamond

This 0.8ct natural marquise sits in the just-under-one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6551378239. Listed at 12 retailers as of October 26, 2026, with a 63% 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551378239
Dimensions9.42 × 4.90 × 3.01 mm
L/W Ratio1.92
Culet sizeNone
Key to symbols
Feather, Cloud
Top View
9.42 mm4.90 mm0.80 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551378239
Side View
Table 60.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 61.5%

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 26
Current: $6,305 AUD|Low: $2,725 AUD|High: $6,305 AUD|Avg: $3,849 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 27, 2026
Retailer 9$2,725 AUD
Retailer 13$2,765 AUD
Retailer 5$2,948 AUD
Retailer 6$2,994 AUD
Retailer 4$3,015 AUD
Retailer 10$3,155 AUD
Retailer 2$3,479 AUD
Retailer 3$3,708 AUD
Retailer 8$3,716 AUD
Retailer 11$4,090 AUD
Retailer 7$4,449 AUD
Retailer 12$5,185 AUD
NZ Jewellers$6,305 AUD

39 data points across 13 retailers

12 retailers$2,725 AUD to $4,449 AUD

A
Cheapest Retailer
-
$2,725 AUD
$1,914 USD
Retailer 2
-
$2,765 AUD
$1,942 USD
View
Price last confirmed 7 days ago
A
Retailer 3
-
$2,948 AUD
$2,071 USD
View
A
Retailer 4
-
$2,994 AUD
£1,656 GBP
View
B+
Retailer 5
-
$3,155 AUD
$2,216 USD
View
B+
Retailer 6
-
$3,479 AUD
$2,444 USD
View
Retailer 7
-
$3,708 AUD
View
Price last confirmed 24 days ago
B+
Retailer 8
-
$3,716 AUD
£2,055 GBP
View
Retailer 9
-
$4,090 AUD
€2,736 EUR
View
Price last confirmed 8 days ago
B+
Retailer 10
-
$4,449 AUD
ZAR 50,493 ZAR
View
Retailer 11
-
$5,185 AUD
£2,868 GBP
View
Price last confirmed 13 days ago
Most Expensive
NZ Jewellers
74675e3d-f34a-4908-a9c6-dd511d231346 · Oct 24
$6,305 AUD
$4,429 USD
View
Price last confirmed 7 days ago
11 more retailers have this diamond
Prices start from $2,725 AUDSave up to $1,725 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
$2,725 AUD