CaratHunter
Plans
Marquise|Natural|GIA

1.21ct D SI1 Marquise Natural Diamond

ID • D/SI1 • GIA 2557704668

Certificate GIA 2557704668

Diamond specifications and retailer prices

From $6,277 AUD
As of November 6, 2026
Save $5,839 AUD (48%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $12,116 AUD at NZ Jewellers · As of November 3, 2026
View at NZ Jewellers

About this 1.21ct natural marquise diamond

This 1.21ct 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 2557704668. Listed at 8 retailers as of November 3, 2026, with prices from $6,277 to $12,116, a $5,839 spread on the same certified stone. NZ Jewellers lists it at $12,116. 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

1.21
Carat
D
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle40.83°
Pavilion angle41.22°
OriginNatural
Grading LabGIA
CertificateGIA 2557704668
Dimensions9.71 × 5.44 × 3.75 mm
L/W Ratio1.78
Girdle conditionVery Thick
Key to symbols
Crystal, Cloud, Feather, Needle, Natural
Top View
9.71 mm5.44 mm1.21 ctD / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2557704668
Side View
Table 57.0%Crown 40.83°Girdle: Very ThickPavilion 41.22°Culet: NoneDepth 68.9%

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 6
Current: $12,116 AUD|Low: $6,277 AUD|High: $12,652 AUD|Avg: $8,096 AUD|-4.2%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 4, 2026
Retailer 5$6,277 AUD
Retailer 4$6,782 AUD
Retailer 2$6,869 AUD
Retailer 6$6,869 AUD
Retailer 7$6,954 AUD
Retailer 8$6,954 AUD
Retailer 3$11,077 AUD
NZ Jewellers$12,116 AUD

23 data points across 8 retailers

8 retailers$6,277 AUD to $12,116 AUD

A
Cheapest Retailer
-
$6,277 AUD
B+
Retailer 2
-
$6,782 AUD
View
B+
Retailer 3
-
$6,869 AUD
View
B+
Retailer 4
-
$6,869 AUD
View
B+
Retailer 5
-
$6,954 AUD
View
B+
Retailer 6
-
$6,954 AUD
View
B
Retailer 7
-
$11,077 AUD
View
Most Expensive
B
NZ Jewellers
80b944d9-a944-45fd-a44e-75b4bba904f5 · Nov 3
$12,116 AUD
$8,325 USD
View
7 more retailers have this diamond
Prices start from $6,277 AUDSave up to $5,839 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
1.21ct Marquise
$6,277 AUD