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Marquise|Natural|IGI

1.21ct K SI1 Marquise Natural Diamond

VG • K/SI1 • IGI 770656600

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 770656600

Diamond specifications and retailer prices

From $1,643 USD
As of November 5, 2026
Save $2,702 USD (62%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $4,345 USD at NZ Jewellers · As of November 5, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 770656600. Listed at 8 retailers as of November 5, 2026, with prices from $1,643 to $4,345, a $2,702 spread on the same certified stone. NZ Jewellers lists it at $4,345. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.21
Carat
K
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle44.6°
Pavilion angle34.4°
OriginNatural
Grading LabIGI
CertificateIGI 770656600
Dimensions10.33 × 5.45 × 3.24 mm
L/W Ratio1.90
Girdle conditionFaceted
Culet sizePointed
Top View
10.33 mm5.45 mm1.21 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 770656600
Side View
Table 60.0%Crown 44.6°Girdle: THK-VTKPavilion 34.4°Culet: NoneDepth 59.4%

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 5
Current: $4,345 USD|Low: $1,506 USD|High: $4,549 USD|Avg: $2,384 USD|-4.5%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 4$1,643 USD
Retailer 2$1,728 USD
Retailer 6$1,782 USD
Retailer 8$1,841 USD
Retailer 7$1,864 USD
Retailer 3$2,376 USD
Retailer 5$3,112 USD
NZ Jewellers$4,345 USD

42 data points across 8 retailers

8 retailers$1,643 USD to $4,345 USD

A
Cheapest Retailer
-
$1,643 USD
A
Retailer 2
-
$1,728 USD
View
A
Retailer 3
-
$1,782 USD
View
B+
Retailer 4
-
$1,841 USD
View
B+
Retailer 5
-
$1,864 USD
View
B+
Retailer 6
-
$2,376 USD
View
B
Retailer 7
-
$3,112 USD
View
Most Expensive
B
NZ Jewellers
c29f788d-337b-418e-a9e7-16f9ddd7a0e5 · Nov 5
$4,345 USD
View
7 more retailers have this diamond
Prices start from $1,643 USDSave up to $2,702 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.

A
1.21ct Marquise
$1,643 USD