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Marquise|Natural|GIA

1.21ct I SI2 Marquise Natural Diamond

GD • I/SI2 • GIA 6551273825

Certificate GIA 6551273825

Diamond specifications and retailer prices

From HK$20,416 HKD
As of November 5, 2026
Save HK$16,741 HKD (45%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: HK$37,157 HKD at Helzberg Diamonds · As of November 6, 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6551273825. Listed at 12 retailers as of November 5, 2026, with prices from HK$20,416 to HK$37,157, a HK$16,741 spread on the same certified stone. Helzberg Diamonds lists it at HK$37,157. 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
I
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.52°
Pavilion angle37.98°
OriginNatural
Grading LabGIA
CertificateGIA 6551273825
Dimensions9.85 × 5.41 × 3.52 mm
L/W Ratio1.82
Culet sizeNone
Top View
9.85 mm5.41 mm1.21 ctI / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551273825
Side View
Table 60.0%Crown 43.52°Girdle: MED-VTKPavilion 37.98°Culet: NoneDepth 65.1%

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: HK$37,157 HKD|Low: HK$19,931 HKD|High: HK$40,276 HKD|Avg: HK$27,373 HKD|-7.7%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 7HK$20,416 HKD
Retailer 4HK$21,247 HKD
Retailer 8HK$21,608 HKD
Retailer 2HK$23,026 HKD
Retailer 3HK$23,528 HKD
Retailer 5HK$23,810 HKD
Retailer 10HK$25,260 HKD
Retailer 6HK$25,973 HKD
Retailer 11HK$26,059 HKD
Retailer 9HK$35,049 HKD
Helzberg DiamondsHK$37,157 HKD

44 data points across 11 retailers

12 retailersHK$20,416 HKD to HK$37,157 HKD

A
Cheapest Retailer
-
HK$20,416 HKD
A
Retailer 2
-
HK$21,247 HKD
View
B+
Retailer 3
-
HK$21,608 HKD
View
B+
Retailer 4
-
HK$23,026 HKD
View
B+
Retailer 5
-
HK$23,528 HKD
View
B+
Retailer 6
-
HK$23,810 HKD
View
B+
Retailer 7
-
HK$25,260 HKD
View
B+
Retailer 8
-
HK$25,973 HKD
View
B+
Retailer 9
-
HK$26,059 HKD
View
B
Retailer 10
-
HK$28,270 HKD
View
B
Retailer 11
-
HK$35,049 HKD
View
Most Expensive
B
Helzberg Diamonds
XZRMLLHINJOIL · Nov 6
HK$37,157 HKD
$4,741 USD
View
11 more retailers have this diamond
Prices start from HK$20,416 HKDSave up to HK$16,741 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.

A
1.21ct Marquise
HK$20,416 HKD