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Cushion|Natural|GIA

1.50ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 6551442183

Certificate GIA 6551442183

Diamond specifications and retailer prices

From $2,675 USD
HK$20,900 HKD
As of November 1, 2026
Save $3,271 USD (55%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $5,946 USD at MOH London · As of November 1, 2026
View at MOH London

About this 1.5ct natural cushion diamond

This 1.5ct natural cushion sits in the one-and-a-half to two 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 6551442183. Listed at 21 retailers as of November 1, 2026, with prices from $2,675 to $5,946, a $3,271 spread on the same certified stone. MOH London lists it at $5,946. 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

1.50
Carat
I
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6551442183
Dimensions7.24 × 5.79 × 3.98 mm
L/W Ratio1.25
Girdle conditionFaceted
Top View
7.24 mm5.79 mm1.50 ctI / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6551442183
Side View
Table 69.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 68.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $5,946 USD|Low: $2,675 USD|High: $6,452 USD|Avg: $3,901 USD|-7.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 1, 2026
Retailer 2$2,675 USD
Retailer 17$2,972 USD
Retailer 7$3,022 USD
Retailer 4$3,025 USD
Retailer 6$3,049 USD
Retailer 15$3,116 USD
Retailer 9$3,235 USD
Retailer 13$3,245 USD
Retailer 14$3,374 USD
Retailer 16$3,427 USD
Retailer 18$3,445 USD
Retailer 10$3,520 USD
Retailer 11$3,540 USD
Retailer 3$4,351 USD
Retailer 19$4,567 USD
Retailer 5$4,715 USD
Retailer 12$5,020 USD
Retailer 8$5,867 USD
MOH London$5,946 USD

19 data points across 19 retailers

21 retailers$2,675 USD to $5,946 USD

A
Cheapest Retailer
-
$2,675 USD
HK$20,900 HKD
A
Retailer 2
-
$2,972 USD
View
Final sale: no returns
A
Retailer 3
-
$3,022 USD
View
A
Retailer 4
-
$3,025 USD
View
A
Retailer 5
-
$3,049 USD
View
A
Retailer 6
-
$3,116 USD
€2,968 EUR
View
A
Retailer 7
-
$3,235 USD
View
A
Retailer 8
-
$3,245 USD
View
A
Retailer 9
-
$3,374 USD
£2,657 GBP
View
A
Retailer 10
-
$3,427 USD
£2,698 GBP
View
A
Retailer 11
-
$3,445 USD
View
Retailer 12
-
$3,520 USD
View
Price last confirmed 13 days ago
A
Retailer 13
-
$3,540 USD
View
B+
Retailer 14
-
$3,951 USD
A$6,078 AUD
View
Retailer 15
-
$4,255 USD
A$6,545 AUD
View
Price last confirmed 24 days ago
A
Retailer 16
-
$4,351 USD
€4,144 EUR
View
B+
Retailer 17
-
$4,567 USD
ZAR 73,781 ZAR
View
B+
Retailer 18
-
$4,715 USD
View
B+
Retailer 19
-
$5,020 USD
View
Retailer 20
-
$5,867 USD
View
Price last confirmed 9 days ago
Most Expensive
B
MOH London
20437D1FD · Nov 1
$5,946 USD
£4,682 GBP
View
20 more retailers have this diamond
Prices start from $2,675 USDSave up to $3,271 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
1.50ct Cushion
$2,675 USD