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Marquise|Natural|GIA

1.20ct D SI1 Marquise Natural Diamond

EX • D/SI1 • GIA 6555380367

Certificate GIA 6555380367

Diamond specifications and retailer prices

From $7,246 AUD
As of November 6, 2026
Save $9,069 AUD (56%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $16,315 AUD at NZ Jewellers · As of November 5, 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 6555380367. Listed at 18 retailers as of November 5, 2026, with prices from $7,246 to $16,315, a $9,069 spread on the same certified stone. NZ Jewellers lists it at $16,315. 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
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6555380367
Dimensions11.02 × 5.41 × 3.46 mm
L/W Ratio2.04
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Needle, Indented Natural
Top View
11.02 mm5.41 mm1.20 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6555380367
Side View
Table 57.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 63.9%

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 6
Current: $10,597 AUD|Low: $7,172 AUD|High: $14,544 AUD|Avg: $10,291 AUD|+2.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 5$7,246 AUD
Retailer 7$9,003 AUD
Retailer 2$9,264 AUD
Retailer 6$9,520 AUD
Retailer 1$10,597 AUD
Retailer 3$11,902 AUD
Retailer 4$14,333 AUD

46 data points across 7 retailers

18 retailers$7,246 AUD to $16,315 AUD

B+
Cheapest Retailer
-
$7,246 AUD
B+
Retailer 2
-
$8,254 AUD
View
Retailer 3
-
$8,259 AUD
View
Price last confirmed 23 days ago
B+
Retailer 4
-
$8,507 AUD
View
B
Retailer 5
-
$9,003 AUD
View
Final sale: no returns
Retailer 6
-
$9,005 AUD
View
Price last confirmed 8 days ago
B
Retailer 7
-
$9,053 AUD
View
B+
Retailer 8
-
$9,264 AUD
View
Retailer 9
-
$9,520 AUD
View
Price last confirmed 25 days ago
B
Retailer 10
-
$9,756 AUD
View
B
Retailer 11
-
$9,905 AUD
View
B
Retailer 12
-
$9,985 AUD
View
B
Retailer 13
-
$10,597 AUD
View
Retailer 14
-
$11,256 AUD
View
Price last confirmed 61 days ago
B
Retailer 15
-
$11,256 AUD
View
B
Retailer 16
-
$11,902 AUD
View
B
Retailer 17
-
$14,333 AUD
View
Most Expensive
B
NZ Jewellers
0bcfb9a2-8027-4021-b8ae-6ab190999d2e · Nov 5
$16,315 AUD
$11,210 USD
View
17 more retailers have this diamond
Prices start from $7,246 AUDSave up to $9,069 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
$7,246 AUD