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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 $8,118 AUD
$5,689 USD
As of November 2, 2026
Save $7,086 AUD (47%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: $15,204 AUD 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 $8,118 to $15,204, a $7,086 spread on the same certified stone. MOH London lists it at $15,204. 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $15,204 AUD|Low: $8,118 AUD|High: $15,387 AUD|Avg: $10,829 AUD|-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$8,118 AUD
Retailer 8$8,533 AUD
Retailer 9$8,701 AUD
Retailer 6$9,124 AUD
Retailer 4$10,286 AUD
Retailer 2$10,351 AUD
Retailer 7$10,518 AUD
Retailer 3$11,261 AUD
Retailer 5$13,404 AUD
MOH London$15,204 AUD

43 data points across 10 retailers

28 retailers$8,118 AUD to $15,204 AUD

B+
Cheapest Retailer
-
$8,118 AUD
$5,689 USD
B+
Retailer 2
-
$8,450 AUD
$5,922 USD
View
B+
Retailer 3
-
$8,475 AUD
View
Retailer 4
-
$8,533 AUD
$5,980 USD
View
Price last confirmed 14 days ago
B+
Retailer 5
-
$8,618 AUD
$6,040 USD
View
B+
Retailer 6
-
$8,701 AUD
$6,098 USD
View
Final sale: no returns
B+
Retailer 7
-
$8,738 AUD
$6,124 USD
View
B+
Retailer 8
-
$9,061 AUD
CA$8,820 CAD
View
B+
Retailer 9
-
$9,124 AUD
$6,394 USD
View
B+
Retailer 10
-
$9,154 AUD
$6,415 USD
View
B+
Retailer 11
-
$9,283 AUD
$6,506 USD
View
B
Retailer 12
-
$9,719 AUD
$6,811 USD
View
B
Retailer 13
-
$10,068 AUD
$7,056 USD
View
B
Retailer 14
-
$10,238 AUD
$7,175 USD
View
B
Retailer 15
-
$10,286 AUD
£5,676 GBP
View
B
Retailer 16
-
$10,351 AUD
£5,712 GBP
View
B
Retailer 17
-
$10,428 AUD
$7,308 USD
View
Retailer 18
-
$10,518 AUD
View
Price last confirmed 11 days ago
B
Retailer 19
-
$10,673 AUD
View
B
Retailer 20
-
$10,959 AUD
$7,680 USD
View
B
Retailer 21
-
$10,959 AUD
$7,680 USD
View
B
Retailer 22
-
$10,996 AUD
$7,706 USD
View
B
Retailer 23
-
$11,261 AUD
€7,516 EUR
View
B
Retailer 24
-
$11,330 AUD
$7,940 USD
View
B
Retailer 25
-
$12,010 AUD
$8,417 USD
View
Retailer 26
-
$12,020 AUD
$8,424 USD
View
Price last confirmed 10 days ago
B
Retailer 27
-
$13,404 AUD
ZAR 151,755 ZAR
View
Most Expensive
B
MOH London
FF8EED978 · Nov 1
$15,204 AUD
£8,390 GBP
View
27 more retailers have this diamond
Prices start from $8,118 AUDSave up to $7,086 AUD

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
$8,118 AUD