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Marquise|Natural|GIA

1.21ct F SI1 Marquise Natural Diamond

EX • F/SI1 • GIA 6555815638

Certificate GIA 6555815638

Diamond specifications and retailer prices

From $9,945 NZD
As of November 5, 2026
Save $8,549 NZD (46%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $21,052 NZD 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 F 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 6555815638. Listed at 15 retailers as of November 4, 2026, with a 86% 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

1.21
Carat
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6555815638
Dimensions10.54 × 5.44 × 3.46 mm
L/W Ratio1.94
Girdle conditionFaceted
Culet sizeNone
Top View
10.54 mm5.44 mm1.21 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6555815638
Side View
Table 54.0%CrownGirdle: THK-ETKPavilionCulet: NoneDepth 63.5%

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: $11,953 NZD|Low: $9,945 NZD|High: $18,766 NZD|Avg: $12,860 NZD|-1.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 5, 2026
Retailer 8$9,945 NZD
Retailer 9$10,607 NZD
Retailer 10$10,614 NZD
Retailer 2$11,402 NZD
Retailer 1$11,953 NZD
Retailer 7$12,216 NZD
Retailer 4$12,252 NZD
Retailer 5$13,697 NZD
Retailer 6$15,463 NZD
Retailer 3$18,494 NZD

38 data points across 10 retailers

15 retailers$9,945 NZD to $18,494 NZD

B+
Cheapest Retailer
-
$9,945 NZD
B
Retailer 2
-
$10,607 NZD
View
B
Retailer 3
-
$10,614 NZD
View
B
Retailer 4
-
$11,402 NZD
View
Retailer 5
-
$11,402 NZD
View
Price last confirmed 9 days ago
B
Retailer 6
-
$11,402 NZD
View
B
Retailer 7
-
$11,953 NZD
View
Retailer 8
-
$12,216 NZD
View
Price last confirmed 16 days ago
B
Retailer 9
-
$12,252 NZD
View
B
Retailer 10
-
$13,158 NZD
View
B
Retailer 11
-
$13,697 NZD
View
Retailer 12
-
$13,874 NZD
View
Price last confirmed 15 days ago
B
Retailer 13
-
$15,463 NZD
View
B
Retailer 14
-
$18,494 NZD
View
Most Expensive
NZ Jewellers
f1aca82f-d0db-43c3-a5f3-41e16ae1135e · Nov 3
$21,052 NZD
$11,670 USD
View
Price under review
14 more retailers have this diamond
Prices start from $9,945 NZDSave up to $8,549 NZD

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
$9,945 NZD