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Cushion|Natural|GIA

1.05ct L SI1 Cushion Natural Diamond

EX • L/SI1 • GIA 2178228123

Certificate GIA 2178228123

Diamond specifications and retailer prices

From $1,972 USD
As of November 4, 2026
Save $969 USD (33%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $2,941 USD at Cape Diamonds · As of November 5, 2026
View at Cape Diamonds

About this 1.05ct natural cushion diamond

This 1.05ct natural cushion sits in the classic one-carat band, graded L colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2178228123. Listed at 9 retailers as of November 4, 2026, with prices from $1,972 to $2,941, a $969 spread on the same certified stone. Cape Diamonds lists it at $2,941. 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

1.05
Carat
L
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2178228123
Dimensions6.55 × 5.49 × 3.73 mm
L/W Ratio1.19
Culet sizeNone
Top View
6.55 mm5.49 mm1.05 ctL / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2178228123
Side View
Table 65.0%CrownGirdle: STK-ETKPavilionCulet: NoneDepth 67.9%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 4
Current: $2,941 USD|Low: $1,935 USD|High: $2,961 USD|Avg: $2,497 USD|+2.7%
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 4$1,935 USD
Retailer 5$2,183 USD
Retailer 6$2,493 USD
Retailer 3$2,549 USD
Retailer 2$2,811 USD
Cape Diamonds$2,941 USD

45 data points across 6 retailers

9 retailers$1,972 USD to $2,941 USD

Retailer 1
-
$1,935 USD
Price last confirmed 12 days ago
B
Retailer 2
-
$1,972 USD
View
Retailer 3
-
$2,183 USD
View
Price last confirmed 8 days ago
B
Retailer 4
-
$2,200 USD
View
B
Retailer 5
-
$2,362 USD
View
B
Retailer 6
-
$2,493 USD
View
B
Retailer 7
-
$2,549 USD
View
B
Retailer 8
-
$2,811 USD
View
Most Expensive
B
Cape Diamonds
cert_2178228123 · Nov 5
$2,941 USD
ZAR 47,510 ZAR
View
8 more retailers have this diamond
Prices start from $1,972 USDSave up to $969 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
1.05ct Cushion
$1,972 USD