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Cushion|Natural|GIA

1.23ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 6291665728

Certificate GIA 6291665728

Diamond specifications and retailer prices

From HK$30,268 HKD
As of November 6, 2026
Save HK$24,227 HKD (44%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: HK$54,495 HKD at MOH London · As of November 7, 2026
View at MOH London

About this 1.23ct natural cushion diamond

This 1.23ct natural cushion sits in the classic one-carat band, graded I 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 6291665728. Listed at 9 retailers as of November 6, 2026, with prices from HK$30,268 to HK$54,495, a HK$24,227 spread on the same certified stone. MOH London lists it at HK$54,495. 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

1.23
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6291665728
Dimensions6.13 × 5.85 × 3.94 mm
L/W Ratio1.05
Top View
6.13 mm5.85 mm1.23 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6291665728
Side View
Table 61.0%CrownGirdle: ThickPavilionCulet: NoneDepth 67.3%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: HK$54,495 HKD|Low: HK$30,096 HKD|High: HK$56,815 HKD|Avg: HK$37,590 HKD|-2.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 7, 2026
Retailer 9HK$30,268 HKD
Retailer 5HK$30,723 HKD
Retailer 7HK$31,083 HKD
Retailer 8HK$34,398 HKD
Retailer 6HK$36,687 HKD
Retailer 3HK$38,709 HKD
Retailer 2HK$39,187 HKD
Retailer 4HK$41,969 HKD
MOH LondonHK$54,495 HKD

45 data points across 9 retailers

9 retailersHK$30,268 HKD to HK$54,495 HKD

B
Cheapest Retailer
-
HK$30,268 HKD
Retailer 2
-
HK$30,723 HKD
View
Price last confirmed 10 days ago
B
Retailer 3
-
HK$31,083 HKD
View
Retailer 4
-
HK$34,398 HKD
View
Price last confirmed 9 days ago
Retailer 5
-
HK$36,687 HKD
View
Price last confirmed 29 days ago
B
Retailer 6
-
HK$38,709 HKD
View
B
Retailer 7
-
HK$39,187 HKD
View
B
Retailer 8
-
HK$41,969 HKD
View
Most Expensive
B
MOH London
1B5FC5FE1 · Nov 7
HK$54,495 HKD
£5,475 GBP
View
8 more retailers have this diamond
Prices start from HK$30,268 HKDSave up to HK$24,227 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
1.23ct Cushion
HK$30,268 HKD