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Cushion|Natural|GIA

1.30ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 6425680153

Certificate GIA 6425680153

Diamond specifications and retailer prices

From HK$38,250 HKD
$4,875 USD
As of October 28, 2026
Save HK$14,212 HKD (27%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: HK$70,738 HKD at MOH London · As of November 1, 2026
View at MOH London

About this 1.3ct natural cushion diamond

This 1.3ct natural cushion sits in the one-and-a-quarter to one-and-a-half 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 6425680153. Listed at 6 retailers as of October 28, 2026, with a 37% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.30
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6425680153
Dimensions6.57 × 6.18 × 4.18 mm
L/W Ratio1.06
Top View
6.57 mm6.18 mm1.30 ctI / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateGIA 6425680153
Side View
Table 76.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 67.6%

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: Oct 28
Current: HK$70,738 HKD|Low: HK$38,250 HKD|High: HK$71,585 HKD|Avg: HK$51,299 HKD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 1, 2026
Retailer 4HK$38,250 HKD
Retailer 2HK$46,062 HKD
Retailer 5HK$47,167 HKD
Retailer 3HK$52,462 HKD
Retailer 6HK$52,953 HKD
MOH LondonHK$70,738 HKD

31 data points across 6 retailers

6 retailersHK$38,250 HKD to HK$52,462 HKD

B
Cheapest Retailer
-
HK$38,250 HKD
$4,875 USD
B
Retailer 2
-
HK$46,062 HKD
£4,623 GBP
View
Retailer 3
-
HK$47,167 HKD
A$9,248 AUD
View
Price last confirmed 34 days ago
B
Retailer 4
-
HK$52,462 HKD
€6,368 EUR
View
Retailer 5
-
HK$52,953 HKD
$6,749 USD
View
Price last confirmed 10 days ago
Most Expensive
MOH London
D6B77A81A · Nov 1
HK$70,738 HKD
£7,099 GBP
View
Price under review
5 more retailers have this diamond
Prices start from HK$38,250 HKDSave up to HK$14,212 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
1.30ct Cushion
HK$38,250 HKD