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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 $3,557 NZD
As of November 4, 2026
Save $1,748 NZD (33%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $5,305 NZD 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 $3,557 to $5,305, a $1,748 spread on the same certified stone. Cape Diamonds lists it at $5,305. 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
Colour
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: $5,305 NZD|Low: $3,491 NZD|High: $5,342 NZD|Avg: $4,505 NZD|+2.7%
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 4$3,491 NZD
Retailer 5$3,938 NZD
Retailer 6$4,497 NZD
Retailer 3$4,598 NZD
Retailer 2$5,071 NZD
Cape Diamonds$5,305 NZD

45 data points across 6 retailers

9 retailers$3,557 NZD to $5,305 NZD

Retailer 1
-
$3,491 NZD
Price last confirmed 12 days ago
B
Retailer 2
-
$3,557 NZD
View
Retailer 3
-
$3,938 NZD
View
Price last confirmed 8 days ago
B
Retailer 4
-
$3,969 NZD
View
B
Retailer 5
-
$4,261 NZD
View
B
Retailer 6
-
$4,497 NZD
View
B
Retailer 7
-
$4,598 NZD
View
B
Retailer 8
-
$5,071 NZD
View
Most Expensive
B
Cape Diamonds
cert_2178228123 · Nov 5
$5,305 NZD
ZAR 47,510 ZAR
View
8 more retailers have this diamond
Prices start from $3,557 NZDSave up to $1,748 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
1.05ct Cushion
$3,557 NZD