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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 $10,111 NZD
$5,689 USD
As of November 2, 2026
Save $8,827 NZD (47%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: $18,938 NZD 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 $10,111 to $18,938, a $8,827 spread on the same certified stone. MOH London lists it at $18,938. 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: $18,938 NZD|Low: $10,111 NZD|High: $19,166 NZD|Avg: $13,486 NZD|-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$10,111 NZD
Retailer 8$10,628 NZD
Retailer 9$10,838 NZD
Retailer 6$11,364 NZD
Retailer 4$12,812 NZD
Retailer 2$12,893 NZD
Retailer 7$13,101 NZD
Retailer 3$14,026 NZD
Retailer 5$16,695 NZD
MOH London$18,938 NZD

44 data points across 10 retailers

28 retailers$10,111 NZD to $18,938 NZD

B+
Cheapest Retailer
-
$10,111 NZD
$5,689 USD
B+
Retailer 2
-
$10,525 NZD
$5,922 USD
View
B+
Retailer 3
-
$10,556 NZD
A$9,137 AUD
View
Retailer 4
-
$10,628 NZD
$5,980 USD
View
Price last confirmed 14 days ago
B+
Retailer 5
-
$10,735 NZD
$6,040 USD
View
B+
Retailer 6
-
$10,838 NZD
$6,098 USD
View
Final sale: no returns
B+
Retailer 7
-
$10,883 NZD
$6,124 USD
View
B+
Retailer 8
-
$11,287 NZD
CA$8,820 CAD
View
B+
Retailer 9
-
$11,364 NZD
$6,394 USD
View
B+
Retailer 10
-
$11,401 NZD
$6,415 USD
View
B+
Retailer 11
-
$11,563 NZD
$6,506 USD
View
B
Retailer 12
-
$12,106 NZD
$6,811 USD
View
B
Retailer 13
-
$12,541 NZD
$7,056 USD
View
B
Retailer 14
-
$12,752 NZD
$7,175 USD
View
B
Retailer 15
-
$12,812 NZD
£5,676 GBP
View
B
Retailer 16
-
$12,893 NZD
£5,712 GBP
View
B
Retailer 17
-
$12,989 NZD
$7,308 USD
View
Retailer 18
-
$13,101 NZD
A$11,340 AUD
View
Price last confirmed 11 days ago
B
Retailer 19
-
$13,295 NZD
A$11,508 AUD
View
B
Retailer 20
-
$13,650 NZD
$7,680 USD
View
B
Retailer 21
-
$13,650 NZD
$7,680 USD
View
B
Retailer 22
-
$13,696 NZD
$7,706 USD
View
B
Retailer 23
-
$14,026 NZD
€7,516 EUR
View
B
Retailer 24
-
$14,112 NZD
$7,940 USD
View
B
Retailer 25
-
$14,960 NZD
$8,417 USD
View
Retailer 26
-
$14,972 NZD
$8,424 USD
View
Price last confirmed 10 days ago
B
Retailer 27
-
$16,695 NZD
ZAR 151,755 ZAR
View
Most Expensive
B
MOH London
FF8EED978 · Nov 1
$18,938 NZD
£8,390 GBP
View
27 more retailers have this diamond
Prices start from $10,111 NZDSave up to $8,827 NZD

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
$10,111 NZD