Cushion|Natural|GIA

1.00ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 1428718547

Certificate GIA 1428718547

Diamond specifications and retailer prices

From $1,024 USD
As of November 6, 2026
Save $1,503 USD (59%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $2,527 USD at MOH London · As of November 4, 2026
View at MOH London

About this 1ct natural cushion diamond

This 1ct natural cushion sits in the classic one-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 1428718547. Listed at 14 retailers as of November 4, 2026, with prices from $1,024 to $2,527, a $1,503 spread on the same certified stone. MOH London lists it at $2,527. 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

1.00
Carat
I
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 1428718547
Dimensions5.22 × 5.22 × 4.14 mm
L/W Ratio1.00
Key to symbols
Crystal, Feather, Cloud, Needle, Indented Natural, Natural
Top View
5.22 mm5.22 mm1.00 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 1428718547
Side View
Table 60.0%CrownGirdle: ThickPavilionCulet: NoneDepth 79.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $2,527 USD|Low: $1,024 USD|High: $2,548 USD|Avg: $1,604 USD|-0.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 9$1,024 USD
Retailer 10$1,321 USD
Retailer 2$1,341 USD
Retailer 8$1,383 USD
Retailer 5$1,428 USD
Retailer 3$1,490 USD
Retailer 6$1,517 USD
Retailer 7$1,688 USD
Retailer 11$1,804 USD
Retailer 4$1,918 USD
MOH London$2,527 USD

35 data points across 11 retailers

14 retailers$1,024 USD to $2,527 USD

A
Cheapest Retailer
-
$1,024 USD
B+
Retailer 2
-
$1,282 USD
View
Retailer 3
-
$1,294 USD
View
Price last confirmed 58 days ago
B+
Retailer 4
-
$1,321 USD
View
Final sale: no returns
A
Retailer 5
-
$1,341 USD
View
Retailer 6
-
$1,383 USD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
$1,428 USD
View
B+
Retailer 8
-
$1,490 USD
View
B+
Retailer 9
-
$1,513 USD
View
B+
Retailer 10
-
$1,517 USD
View
B+
Retailer 11
-
$1,688 USD
View
Retailer 12
-
$1,804 USD
View
Price last confirmed 32 days ago
B+
Retailer 13
-
$1,918 USD
View
Most Expensive
B
MOH London
B3C613D10 · Nov 4
$2,527 USD
£1,990 GBP
View
13 more retailers have this diamond
Prices start from $1,024 USDSave up to $1,503 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.

A
1.00ct Cushion
$1,024 USD