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Marquise|Natural|GIA

1.20ct D SI1 Marquise Natural Diamond

EX • D/SI1 • GIA 2556683633

Certificate GIA 2556683633

Diamond specifications and retailer prices

From $8,510 AUD
As of November 5, 2026
Save $291 AUD (3%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $16,418 AUD at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

About this 1.2ct natural marquise diamond

This 1.2ct natural marquise sits in the classic one-carat band, graded D 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 2556683633. Listed at 14 retailers as of November 4, 2026, with a relatively tight 3% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

1.20
Carat
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556683633
Dimensions10.86 × 5.72 × 3.41 mm
L/W Ratio1.90
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cavity, Needle, Indented Natural, Natural
Top View
10.86 mm5.72 mm1.20 ctD / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 2556683633
Side View
Table 60.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 59.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $8,510 AUD|Low: $7,172 AUD|High: $14,637 AUD|Avg: $9,661 AUD|+0.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 5, 2026
Retailer 16$7,172 AUD
Retailer 13$7,714 AUD
Retailer 15$7,954 AUD
Retailer 6$8,246 AUD
Retailer 4$8,377 AUD
Retailer 1$8,510 AUD
Retailer 5$8,801 AUD
Retailer 11$8,897 AUD
Retailer 9$8,965 AUD
Retailer 7$9,061 AUD
Retailer 10$9,322 AUD
Retailer 2$9,453 AUD
Retailer 17$9,871 AUD
Retailer 12$10,491 AUD
Retailer 8$11,809 AUD
Retailer 14$12,781 AUD
Retailer 3$14,372 AUD

22 data points across 17 retailers

14 retailers$8,510 AUD to $8,801 AUD

Retailer 1
-
$7,172 AUD
Price last confirmed 26 days ago
Retailer 2
-
$7,954 AUD
View
Price last confirmed 29 days ago
Retailer 3
-
$8,246 AUD
View
Price last confirmed 28 days ago
B+
Retailer 4
-
$8,510 AUD
View
B
Retailer 5
-
$8,801 AUD
View
Retailer 6
-
$8,898 AUD
View
Price last confirmed 29 days ago
Retailer 7
-
$9,453 AUD
View
Price last confirmed 33 days ago
Retailer 8
-
$9,817 AUD
View
Price last confirmed 39 days ago
Retailer 9
-
$9,871 AUD
View
Price last confirmed 28 days ago
Retailer 10
-
$11,327 AUD
View
Price last confirmed 38 days ago
Retailer 11
-
$11,809 AUD
View
Price last confirmed 42 days ago
Retailer 12
-
$12,781 AUD
View
Price last confirmed 26 days ago
Retailer 13
-
$14,372 AUD
View
Price last confirmed 32 days ago
Most Expensive
NZ Jewellers
bf39d3d5-c702-4716-9393-974cdb4c8b3d · Sep 30
$16,418 AUD
$11,281 USD
View
Price last confirmed 37 days ago
13 more retailers have this diamond
Prices start from $8,510 AUDSave up to $291 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.

B+
1.20ct Marquise
$8,510 AUD