Cushion|Natural|GIA

1.55ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 6452554551

Certificate GIA 6452554551

Diamond specifications and retailer prices

From $4,376 USD
As of October 30, 2026
Save $4,445 USD (50%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $8,821 USD at MOH London · As of November 1, 2026
View at MOH London

About this 1.55ct natural cushion diamond

This 1.55ct natural cushion sits in the one-and-a-half to two carat band, graded J 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 6452554551. Listed at 17 retailers as of October 30, 2026, with prices from $4,376 to $8,821, a $4,445 spread on the same certified stone. MOH London lists it at $8,821. 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

1.55
Carat
J
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle38.3°
OriginNatural
Grading LabGIA
CertificateGIA 6452554551
Dimensions6.70 × 6.49 × 4.49 mm
L/W Ratio1.03
Top View
6.70 mm6.49 mm1.55 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6452554551
Side View
Table 59.0%Crown 36.3°Girdle: 3.4Pavilion 38.3°Culet: NoneDepth 69.1%

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: Oct 30
Current: $8,821 USD|Low: $4,376 USD|High: $8,927 USD|Avg: $5,757 USD|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 6$4,376 USD
Retailer 7$4,445 USD
Retailer 9$4,631 USD
Retailer 8$5,017 USD
Retailer 2$5,329 USD
Retailer 3$5,404 USD
Retailer 10$5,547 USD
Retailer 5$5,894 USD
Retailer 4$6,808 USD
MOH London$8,821 USD

35 data points across 10 retailers

17 retailers$4,376 USD to $8,821 USD

B+
Cheapest Retailer
-
$4,376 USD
B+
Retailer 2
-
$4,445 USD
View
B
Retailer 3
-
$4,631 USD
View
Final sale: no returns
B
Retailer 4
-
$4,713 USD
View
B
Retailer 5
-
$4,720 USD
View
B+
Retailer 6
-
$5,017 USD
View
B
Retailer 7
-
$5,277 USD
View
B+
Retailer 8
-
$5,329 USD
£4,196 GBP
View
B
Retailer 9
-
$5,404 USD
£4,255 GBP
View
Retailer 10
-
$5,547 USD
A$8,534 AUD
View
Price last confirmed 22 days ago
B
Retailer 11
-
$5,620 USD
View
B
Retailer 12
-
$5,620 USD
View
B
Retailer 13
-
$5,810 USD
View
B
Retailer 14
-
$5,894 USD
€5,613 EUR
View
Retailer 15
-
$6,111 USD
View
Price last confirmed 9 days ago
B
Retailer 16
-
$6,808 USD
ZAR 109,980 ZAR
View
Most Expensive
B
MOH London
865F3525F · Nov 1
$8,821 USD
£6,946 GBP
View
16 more retailers have this diamond
Prices start from $4,376 USDSave up to $4,445 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+
1.55ct Cushion
$4,376 USD