Cushion|Natural|GIA

0.91ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 5181865090

Certificate GIA 5181865090

Diamond specifications and retailer prices

From $1,670 USD
As of November 1, 2026
Save $2,223 USD (57%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $3,893 USD at Moon Ocean · As of November 2, 2026
View at Moon Ocean

About this 0.91ct natural cushion diamond

This 0.91ct natural cushion sits in the just-under-one-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 5181865090. Listed at 11 retailers as of November 1, 2026, with prices from $1,670 to $3,893, a $2,223 spread on the same certified stone. Moon Ocean lists it at $3,893. 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

0.91
Carat
J
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5181865090
Dimensions5.69 × 5.67 × 3.88 mm
L/W Ratio1.00
Top View
5.69 mm5.67 mm0.91 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5181865090
Side View
Table 56.0%CrownGirdle: MED-STKPavilionCulet: NDepth 68.4%

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 1
Current: $3,893 USD|Low: $1,833 USD|High: $3,944 USD|Avg: $2,784 USD|-1.2%
Moon Ocean
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 7$1,833 USD
Retailer 2$2,219 USD
Retailer 6$2,495 USD
Retailer 5$2,763 USD
Retailer 4$2,984 USD
Retailer 3$3,545 USD
Moon Ocean$3,893 USD

39 data points across 7 retailers

11 retailers$1,670 USD to $3,893 USD

B+
Cheapest Retailer
-
$1,670 USD
B
Retailer 2
-
$1,768 USD
View
B
Retailer 3
-
$1,833 USD
View
B
Retailer 4
-
$1,890 USD
View
B
Retailer 5
-
$2,217 USD
View
B
Retailer 6
-
$2,219 USD
£1,748 GBP
View
Retailer 7
-
$2,495 USD
A$3,838 AUD
View
Price last confirmed 27 days ago
B
Retailer 8
-
$2,763 USD
€2,631 EUR
View
B
Retailer 9
-
$2,984 USD
ZAR 48,210 ZAR
View
B
Retailer 10
-
$3,545 USD
£2,791 GBP
View
Most Expensive
B
Moon Ocean
NVN-225715C3B-090 · Nov 2
$3,893 USD
£3,065 GBP
View
10 more retailers have this diamond
Prices start from $1,670 USDSave up to $2,223 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+
0.91ct Cushion
$1,670 USD