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Cushion|Natural|GIA

1.80ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 1232955452

Certificate GIA 1232955452

Diamond specifications and retailer prices

From HK$19,061 HKD
As of November 6, 2026
Save HK$24,058 HKD (56%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: HK$43,119 HKD at MOH London · As of November 4, 2026
View at MOH London

About this 1.8ct natural cushion diamond

This 1.8ct natural cushion sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1232955452. Listed at 8 retailers as of November 4, 2026, with prices from HK$19,061 to HK$43,119, a HK$24,058 spread on the same certified stone. MOH London lists it at HK$43,119. 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

1.80
Carat
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Pavilion angle35.99°
OriginNatural
Grading LabGIA
CertificateGIA 1232955452
Dimensions8.05 × 6.31 × 4.33 mm
L/W Ratio1.28
Key to symbols
Crystal, Feather, Cavity, Needle
Top View
8.05 mm6.31 mm1.80 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1232955452
Side View
Table 62.0%CrownGirdle: STK-VTKPavilion 35.99°Culet: NoneDepth 68.6%

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 6
Current: HK$43,119 HKD|Low: HK$19,061 HKD|High: HK$48,026 HKD|Avg: HK$29,347 HKD|-10.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 5HK$19,061 HKD
Retailer 7HK$23,787 HKD
Retailer 2HK$25,080 HKD
Retailer 4HK$26,537 HKD
Retailer 6HK$27,932 HKD
Retailer 8HK$28,465 HKD
Retailer 3HK$30,840 HKD
MOH LondonHK$43,119 HKD

39 data points across 8 retailers

8 retailersHK$19,061 HKD to HK$43,119 HKD

A
Cheapest Retailer
-
HK$19,061 HKD
A
Retailer 2
-
HK$23,787 HKD
View
A
Retailer 3
-
HK$25,080 HKD
View
A
Retailer 4
-
HK$26,537 HKD
View
A
Retailer 5
-
HK$27,932 HKD
View
B+
Retailer 6
-
HK$28,465 HKD
View
A
Retailer 7
-
HK$30,840 HKD
View
Most Expensive
B
MOH London
CA5457909 · Nov 4
HK$43,119 HKD
£4,332 GBP
View
7 more retailers have this diamond
Prices start from HK$19,061 HKDSave up to HK$24,058 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
1.80ct Cushion
HK$19,061 HKD