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Cushion|Natural|GIA

1.21ct J SI2 Cushion Natural Diamond

EX • J/SI2 • GIA 2231870257

Certificate GIA 2231870257

Diamond specifications and retailer prices

From HK$26,449 HKD
$3,371 USD
As of October 31, 2026
1 retailer carries this diamond
Only listing: HK$26,449 HKD at Blue Nile
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Blue Nile

About this 1.21ct natural cushion diamond

This 1.21ct natural cushion sits in the classic one-carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2231870257. Listed at a single retailer as of October 31, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Pavilion angle36.76°
OriginNatural
Grading LabGIA
CertificateGIA 2231870257
Dimensions7.07 × 5.47 × 3.81 mm
L/W Ratio1.29
Key to symbols
Feather
Top View
7.07 mm5.47 mm1.21 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2231870257
Side View
Table 66.0%CrownGirdle: STK-ETKPavilion 36.76°Culet: NoneDepth 69.7%

Caratlytics Score

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C
Average
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Price History

Last verified: Oct 31
Current: HK$26,449 HKD|Low: HK$12,755 HKD|High: HK$33,550 HKD|Avg: HK$18,735 HKD|+31.4%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 24, 2026
Retailer 4HK$12,755 HKD
Retailer 2HK$15,873 HKD
Retailer 6HK$17,610 HKD
Retailer 3HK$18,585 HKD
Retailer 5HK$20,876 HKD
Blue NileHK$26,449 HKD

3 data points across 6 retailers

1 retailer

C
Blue Nile
30435289 · Oct 31
HK$26,449 HKD
$3,371 USD
View

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.

C
1.21ct Cushion
HK$26,449 HKD