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Cushion|Natural|GIA

1.30ct I SI1 Cushion Natural Diamond

ID • I/SI1 • GIA 6435484641

Certificate GIA 6435484641

Diamond specifications and retailer prices

From $1,984 USD
HK$15,500 HKD
As of November 1, 2026
Save $2,472 USD (55%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $4,456 USD at MOH London · As of November 2, 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 6435484641. Listed at 23 retailers as of November 1, 2026, with prices from $1,984 to $4,456, a $2,472 spread on the same certified stone. MOH London lists it at $4,456. 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
Color
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.5°
Pavilion angle57.65°
OriginNatural
Grading LabGIA
CertificateGIA 6435484641
Dimensions6.24 × 5.92 × 4.14 mm
L/W Ratio1.05
Top View
6.24 mm5.92 mm1.30 ctI / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6435484641
Side View
Table 64.0%Crown 38.5°Girdle: STK-VTKPavilion 57.65°Culet: NoneDepth 69.9%

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 1
Current: $4,456 USD|Low: $1,984 USD|High: $4,511 USD|Avg: $2,760 USD|-0.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 7$1,984 USD
Retailer 2$2,003 USD
Retailer 11$2,258 USD
Retailer 3$2,347 USD
Retailer 4$2,481 USD
Retailer 10$2,520 USD
Retailer 9$2,556 USD
Retailer 6$2,719 USD
Retailer 8$3,127 USD
Retailer 5$3,175 USD
MOH London$4,456 USD

26 data points across 11 retailers

23 retailers$1,984 USD to $4,456 USD

A
Cheapest Retailer
-
$1,984 USD
HK$15,500 HKD
A
Retailer 2
-
$2,003 USD
₹190,716 INR
View
A
Retailer 3
-
$2,253 USD
A$3,465 AUD
View
A
Retailer 4
-
$2,258 USD
SGD 3,052 SGD
View
A
Retailer 5
-
$2,283 USD
View
A
Retailer 6
-
$2,298 USD
View
A
Retailer 7
-
$2,347 USD
View
Final sale: no returns
A
Retailer 8
-
$2,481 USD
£1,954 GBP
View
A
Retailer 9
-
$2,520 USD
View
A
Retailer 10
-
$2,544 USD
View
A
Retailer 11
-
$2,556 USD
View
A
Retailer 12
-
$2,684 USD
View
A
Retailer 13
-
$2,719 USD
£2,141 GBP
View
A
Retailer 14
-
$2,754 USD
View
A
Retailer 15
-
$2,764 USD
SGD 3,735 SGD
View
A
Retailer 16
-
$2,770 USD
View
A
Retailer 17
-
$2,812 USD
View
Retailer 18
-
$2,850 USD
A$4,385 AUD
View
Price last confirmed 25 days ago
B+
Retailer 19
-
$3,127 USD
ZAR 50,513 ZAR
View
B+
Retailer 20
-
$3,175 USD
€3,024 EUR
View
B
Retailer 21
-
$3,739 USD
View
B
Retailer 22
-
$3,844 USD
View
Most Expensive
B
MOH London
C75FA4012 · Nov 2
$4,456 USD
£3,509 GBP
View
22 more retailers have this diamond
Prices start from $1,984 USDSave up to $2,472 USD

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
1.30ct Cushion
$1,984 USD