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Marquise|Natural|GIA

1.21ct H SI1 Marquise Natural Diamond

EX • H/SI1 • GIA 6552770005

Certificate GIA 6552770005

Diamond specifications and retailer prices

From $4,675 USD
As of November 1, 2026
Save $4,257 USD (48%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $8,932 USD at MOH London · As of November 4, 2026
View at MOH London

About this 1.21ct natural marquise diamond

This 1.21ct natural marquise sits in the classic one-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6552770005. Listed at 12 retailers as of November 1, 2026, with prices from $4,675 to $8,932, a $4,257 spread on the same certified stone. MOH London lists it at $8,932. 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
H
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6552770005
Dimensions10.75 × 5.65 × 3.41 mm
L/W Ratio1.90
Girdle conditionFaceted
Culet sizeNone
Top View
10.75 mm5.65 mm1.21 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6552770005
Side View
Table 55.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 60.4%

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 1
Current: $8,932 USD|Low: $4,675 USD|High: $9,064 USD|Avg: $5,958 USD|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 6$4,675 USD
Retailer 7$4,803 USD
Retailer 3$4,843 USD
Retailer 9$5,126 USD
Retailer 8$5,155 USD
Retailer 4$5,774 USD
Retailer 11$5,829 USD
Retailer 2$5,897 USD
Retailer 10$6,040 USD
Retailer 5$7,416 USD
MOH London$8,932 USD

45 data points across 11 retailers

12 retailers$4,675 USD to $8,932 USD

B+
Cheapest Retailer
-
$4,675 USD
B+
Retailer 2
-
$4,803 USD
View
B+
Retailer 3
-
$4,843 USD
View
B
Retailer 4
-
$5,126 USD
View
B
Retailer 5
-
$5,155 USD
View
B
Retailer 6
-
$5,774 USD
View
B
Retailer 7
-
$5,829 USD
View
B
Retailer 8
-
$5,897 USD
View
B
Retailer 9
-
$6,033 USD
View
Retailer 10
-
$6,040 USD
View
Price last confirmed 34 days ago
B
Retailer 11
-
$7,416 USD
View
Most Expensive
B
MOH London
925C02E91 · Nov 4
$8,932 USD
£7,033 GBP
View
11 more retailers have this diamond
Prices start from $4,675 USDSave up to $4,257 USD

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
$4,675 USD