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Cushion|Natural|GIA

1.80ct I SI2 Cushion Natural Diamond

EX • I/SI2 • GIA 5231920157

Certificate GIA 5231920157

Diamond specifications and retailer prices

From $6,902 USD
As of October 31, 2026
1 retailer carries this diamond
Only listing: $6,902 USD at Blue Nile
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Blue Nile

About this 1.8ct natural cushion diamond

This 1.8ct natural cushion sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5231920157. Listed at a single retailer as of October 31, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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

1.80
Carat
I
Color
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle36.73°
OriginNatural
Grading LabGIA
CertificateGIA 5231920157
Dimensions8.02 × 6.32 × 4.39 mm
L/W Ratio1.27
Top View
8.02 mm6.32 mm1.80 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5231920157
Side View
Table 62.0%CrownGirdle: STK-VTKPavilion 36.73°Culet: NoneDepth 69.4%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 31
Current: $6,902 USD|Low: $4,915 USD|High: $7,511 USD|Avg: $6,273 USD|-8.1%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 29, 2026
Retailer 3$4,915 USD
Retailer 5$5,552 USD
Retailer 2$5,879 USD
Blue Nile$6,902 USD
Retailer 4$6,949 USD
Retailer 6$7,199 USD

5 data points across 6 retailers

1 retailer

B
Blue Nile
30046476 · Oct 31
$6,902 USD
View

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
1.80ct Cushion
$6,902 USD