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Marquise|Natural|GIA

1.21ct D SI1 Marquise Natural Diamond

ID • D/SI1 • GIA 7558598063

Certificate GIA 7558598063

Diamond specifications and retailer prices

From $6,485 AUD
As of November 5, 2026
Save $6,108 AUD (49%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $12,594 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 7558598063. Listed at 10 retailers as of November 3, 2026, with prices from $6,485 to $12,594, a $6,108 spread on the same certified stone. NZ Jewellers lists it at $12,594. 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
FluorescenceMedium
Crown angle40.62°
Pavilion angle40.11°
OriginNatural
Grading LabGIA
CertificateGIA 7558598063
Dimensions9.78 × 5.47 × 3.69 mm
L/W Ratio1.79
Girdle conditionVery Thick
Key to symbols
Crystal, Knot, Indented Natural
Top View
9.78 mm5.47 mm1.21 ctD / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 7558598063
Side View
Table 59.0%Crown 40.62°GirdlePavilion 40.11°CuletDepth 67.3%

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: $12,594 AUD|Low: $6,485 AUD|High: $12,742 AUD|Avg: $8,387 AUD|-0.5%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 3$6,485 AUD
Retailer 4$6,957 AUD
Retailer 5$7,050 AUD
Retailer 7$7,102 AUD
Retailer 8$7,229 AUD
Retailer 9$7,229 AUD
Retailer 10$7,631 AUD
Retailer 2$8,162 AUD
Retailer 6$11,512 AUD
NZ Jewellers$12,594 AUD

30 data points across 10 retailers

10 retailers$6,485 AUD to $12,594 AUD

B+
Cheapest Retailer
-
$6,485 AUD
B+
Retailer 2
-
$6,957 AUD
View
B+
Retailer 3
-
$7,050 AUD
View
B+
Retailer 4
-
$7,102 AUD
View
B+
Retailer 5
-
$7,229 AUD
View
B+
Retailer 6
-
$7,229 AUD
View
Retailer 7
-
$7,631 AUD
View
Price last confirmed 28 days ago
B+
Retailer 8
-
$8,162 AUD
View
B
Retailer 9
-
$11,512 AUD
View
Most Expensive
B
NZ Jewellers
e133051b-13b6-4904-b503-a4873a6cd697 · Nov 3
$12,594 AUD
$8,653 USD
View
9 more retailers have this diamond
Prices start from $6,485 AUDSave up to $6,108 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+
1.21ct Marquise
$6,485 AUD