Marquise|Natural|GIA

1.21ct J SI1 Marquise Natural Diamond

GD • J/SI1 • GIA 2554338825

Certificate GIA 2554338825

Diamond specifications and retailer prices

From $2,586 USD
As of October 31, 2026
Save $2,332 USD (47%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $4,918 USD at Helzberg Diamonds · As of November 1, 2026
View at Helzberg Diamonds

About this 1.21ct natural marquise diamond

This 1.21ct natural marquise sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2554338825. Listed at 14 retailers as of October 31, 2026, with prices from $2,586 to $4,918, a $2,332 spread on the same certified stone. Helzberg Diamonds lists it at $4,918. 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
J
Color
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.87°
Pavilion angle39.78°
OriginNatural
Grading LabGIA
CertificateGIA 2554338825
Dimensions9.83 × 5.39 × 3.60 mm
L/W Ratio1.82
Culet sizeNone
Top View
9.83 mm5.39 mm1.21 ctJ / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2554338825
Side View
Table 59.0%Crown 43.87°Girdle: STK-VTKPavilion 39.78°Culet: NoneDepth 66.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $4,918 USD|Low: $2,586 USD|High: $5,224 USD|Avg: $3,557 USD|-5.9%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 2, 2026
Retailer 8$2,586 USD
Retailer 12$2,634 USD
Retailer 10$2,797 USD
Retailer 9$2,812 USD
Retailer 7$3,025 USD
Retailer 4$3,116 USD
Retailer 2$3,313 USD
Retailer 13$3,336 USD
Retailer 3$3,433 USD
Retailer 6$3,453 USD
Retailer 11$4,361 USD
Retailer 5$4,637 USD
Helzberg Diamonds$4,918 USD

43 data points across 13 retailers

14 retailers$2,586 USD to $4,918 USD

B+
Cheapest Retailer
-
$2,586 USD
B+
Retailer 2
-
$2,634 USD
SGD 3,560 SGD
View
B+
Retailer 3
-
$2,797 USD
View
B+
Retailer 4
-
$2,812 USD
View
B
Retailer 5
-
$3,025 USD
£2,382 GBP
View
B
Retailer 6
-
$3,116 USD
SGD 4,211 SGD
View
B
Retailer 7
-
$3,313 USD
View
B
Retailer 8
-
$3,336 USD
View
B
Retailer 9
-
$3,433 USD
View
B
Retailer 10
-
$3,453 USD
€3,289 EUR
View
B
Retailer 11
-
$3,666 USD
View
B
Retailer 12
-
$4,361 USD
View
B
Retailer 13
-
$4,637 USD
View
Most Expensive
C
Helzberg Diamonds
XZRILLKJJOOIL · Nov 1
$4,918 USD
View
13 more retailers have this diamond
Prices start from $2,586 USDSave up to $2,332 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
$2,586 USD