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Cushion|Natural|GIA

1.50ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 1517368138

Certificate GIA 1517368138

Diamond specifications and retailer prices

From $5,689 USD
As of November 2, 2026
Save $4,966 USD (47%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: $10,655 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 1517368138. Listed at 28 retailers as of November 1, 2026, with prices from $5,689 to $10,655, a $4,966 spread on the same certified stone. MOH London lists it at $10,655. 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
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.9°
Pavilion angle34.91°
OriginNatural
Grading LabGIA
CertificateGIA 1517368138
Dimensions7.47 × 5.79 × 4.04 mm
L/W Ratio1.29
Key to symbols
Crystal, Needle
Top View
7.47 mm5.79 mm1.50 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1517368138
Side View
Table 65.0%Crown 41.9°Girdle: THK-VTKPavilion 34.91°Culet: NoneDepth 69.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $10,655 USD|Low: $5,689 USD|High: $10,784 USD|Avg: $7,588 USD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 10$5,689 USD
Retailer 8$5,980 USD
Retailer 9$6,098 USD
Retailer 6$6,394 USD
Retailer 4$7,208 USD
Retailer 2$7,254 USD
Retailer 7$7,371 USD
Retailer 3$7,892 USD
Retailer 5$9,394 USD
MOH London$10,655 USD

44 data points across 10 retailers

28 retailers$5,689 USD to $10,655 USD

B+
Cheapest Retailer
-
$5,689 USD
B+
Retailer 2
-
$5,922 USD
View
B+
Retailer 3
-
$5,939 USD
A$9,137 AUD
View
Retailer 4
-
$5,980 USD
View
Price last confirmed 14 days ago
B+
Retailer 5
-
$6,040 USD
View
B+
Retailer 6
-
$6,098 USD
View
Final sale: no returns
B+
Retailer 7
-
$6,124 USD
View
B+
Retailer 8
-
$6,350 USD
CA$8,820 CAD
View
B+
Retailer 9
-
$6,394 USD
View
B+
Retailer 10
-
$6,415 USD
View
B+
Retailer 11
-
$6,506 USD
View
B
Retailer 12
-
$6,811 USD
View
B
Retailer 13
-
$7,056 USD
View
B
Retailer 14
-
$7,175 USD
View
B
Retailer 15
-
$7,208 USD
£5,676 GBP
View
B
Retailer 16
-
$7,254 USD
£5,712 GBP
View
B
Retailer 17
-
$7,308 USD
View
Retailer 18
-
$7,371 USD
A$11,340 AUD
View
Price last confirmed 11 days ago
B
Retailer 19
-
$7,480 USD
A$11,508 AUD
View
B
Retailer 20
-
$7,680 USD
View
B
Retailer 21
-
$7,680 USD
View
B
Retailer 22
-
$7,706 USD
View
B
Retailer 23
-
$7,892 USD
€7,516 EUR
View
B
Retailer 24
-
$7,940 USD
View
B
Retailer 25
-
$8,417 USD
View
Retailer 26
-
$8,424 USD
View
Price last confirmed 10 days ago
B
Retailer 27
-
$9,394 USD
ZAR 151,755 ZAR
View
Most Expensive
B
MOH London
FF8EED978 · Nov 1
$10,655 USD
£8,390 GBP
View
27 more retailers have this diamond
Prices start from $5,689 USDSave up to $4,966 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.

B+
1.50ct Cushion
$5,689 USD