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Marquise|Natural|GIA

1.21ct J SI1 Marquise Natural Diamond

EX • J/SI1 • GIA 5241045555

Certificate GIA 5241045555

Diamond specifications and retailer prices

From HK$22,266 HKD
As of October 31, 2026
Save HK$19,241 HKD (46%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: HK$41,507 HKD at Helzberg Diamonds · As of November 3, 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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5241045555. Listed at 14 retailers as of October 31, 2026, with prices from HK$22,266 to HK$41,507, a HK$19,241 spread on the same certified stone. Helzberg Diamonds lists it at HK$41,507. 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
Crown angle39.63°
Pavilion angle40.08°
OriginNatural
Grading LabGIA
CertificateGIA 5241045555
Dimensions11.24 × 5.28 × 3.40 mm
L/W Ratio2.13
Culet sizeNone
Top View
11.24 mm5.28 mm1.21 ctJ / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5241045555
Side View
Table 59.0%Crown 39.63°Girdle: STK-THKPavilion 40.08°Culet: NDepth 64.3%

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: Oct 31
Current: HK$41,507 HKD|Low: HK$22,266 HKD|High: HK$45,010 HKD|Avg: HK$29,564 HKD|-7.8%
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
Retailer 14
November 5, 2026
Retailer 3HK$22,266 HKD
Retailer 2HK$22,807 HKD
Retailer 13HK$23,489 HKD
Retailer 8HK$23,591 HKD
Retailer 14HK$24,006 HKD
Retailer 12HK$25,519 HKD
Retailer 11HK$26,294 HKD
Retailer 9HK$28,050 HKD
Retailer 5HK$28,450 HKD
Retailer 10HK$28,701 HKD
Retailer 7HK$29,085 HKD
Retailer 6HK$37,557 HKD
Retailer 4HK$39,822 HKD
Helzberg DiamondsHK$41,507 HKD

35 data points across 14 retailers

14 retailersHK$22,266 HKD to HK$41,507 HKD

B+
Cheapest Retailer
-
HK$22,266 HKD
B+
Retailer 2
-
HK$22,807 HKD
View
B+
Retailer 3
-
HK$23,489 HKD
View
B+
Retailer 4
-
HK$23,591 HKD
View
B+
Retailer 5
-
HK$24,006 HKD
View
B
Retailer 6
-
HK$25,519 HKD
View
B
Retailer 7
-
HK$26,294 HKD
View
B
Retailer 8
-
HK$28,050 HKD
View
B
Retailer 9
-
HK$28,450 HKD
View
B
Retailer 10
-
HK$28,701 HKD
View
B
Retailer 11
-
HK$29,085 HKD
View
B
Retailer 12
-
HK$37,557 HKD
View
Retailer 13
-
HK$39,822 HKD
View
Price last confirmed 11 days ago
Most Expensive
B
Helzberg Diamonds
XZRLIKHGKLLLL · Nov 3
HK$41,507 HKD
$5,296 USD
View
13 more retailers have this diamond
Prices start from HK$22,266 HKDSave up to HK$19,241 HKD

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
HK$22,266 HKD