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Marquise|Natural|GIA

1.00ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 2556641575

Certificate GIA 2556641575

Diamond specifications and retailer prices

From $2,453 AUD
As of November 5, 2026
Save $1,953 AUD (44%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $4,731 AUD at Wholesale Diamonds Direct · As of October 27, 2026
View at Wholesale Diamonds Direct

About this 1ct natural marquise diamond

This 1ct natural marquise sits in the classic 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 2556641575. Listed at 13 retailers as of November 1, 2026, with a 80% 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

1.00
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.94°
Pavilion angle40.11°
OriginNatural
Grading LabGIA
CertificateGIA 2556641575
Dimensions9.80 × 5.19 × 3.33 mm
L/W Ratio1.89
Culet sizeNone
Top View
9.80 mm5.19 mm1.00 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556641575
Side View
Table 58.0%Crown 39.94°Girdle: STK-THKPavilion 40.11°Culet: NoneDepth 64.3%

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 5
Current: $2,453 AUD|Low: $2,438 AUD|High: $4,824 AUD|Avg: $3,512 AUD|-3.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Wholesale Diamonds Direct
November 5, 2026
Retailer 1$2,453 AUD
Retailer 9$2,866 AUD
Retailer 8$2,890 AUD
Retailer 7$2,916 AUD
Retailer 3$3,146 AUD
Retailer 5$3,163 AUD
Retailer 11$3,433 AUD
Retailer 6$3,626 AUD
Retailer 2$3,656 AUD
Retailer 4$4,070 AUD
Retailer 10$4,405 AUD
Wholesale Diamonds Direct$4,731 AUD

38 data points across 12 retailers

13 retailers$2,453 AUD to $4,405 AUD

A
Cheapest Retailer
-
$2,453 AUD
A
Retailer 2
-
$2,866 AUD
View
A
Retailer 3
-
$2,890 AUD
View
A
Retailer 4
-
$2,916 AUD
View
A
Retailer 5
-
$3,146 AUD
View
A
Retailer 6
-
$3,163 AUD
View
A
Retailer 7
-
$3,433 AUD
View
A
Retailer 8
-
$3,626 AUD
View
B+
Retailer 9
-
$3,630 AUD
View
B+
Retailer 10
-
$3,656 AUD
View
B+
Retailer 11
-
$4,070 AUD
View
B+
Retailer 12
-
$4,405 AUD
View
Most Expensive
Wholesale Diamonds Direct
610445789 · Oct 27
$4,731 AUD
$3,312 USD
View
Price last confirmed 9 days ago
12 more retailers have this diamond
Prices start from $2,453 AUDSave up to $1,953 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
1.00ct Marquise
$2,453 AUD