Cushion|Natural|GIA

1.80ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 2557837840

Certificate GIA 2557837840

Diamond specifications and retailer prices

From $4,588 USD
A$7,058 AUD
As of November 6, 2026
1 retailer carries this diamond
Only listing: $4,588 USD at GemTrove
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 GemTrove

About this 1.8ct natural cushion diamond

This 1.8ct natural cushion sits in the one-and-a-half to two carat band, graded K 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 2557837840. Listed at a single retailer as of November 6, 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
K
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 2557837840
Dimensions8.47 × 6.24 × 4.22 mm
L/W Ratio1.36
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Cloud, Crystal, Needle, Indented Natural, Natural
Top View
8.47 mm6.24 mm1.80 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 2557837840
Side View
Table 64.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 67.6%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 6
Current: $4,588 USD|Low: $3,584 USD|High: $5,707 USD|Avg: $4,441 USD
GemTrove
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
September 9, 2026
Retailer 7$3,596 USD
Retailer 4$3,833 USD
Retailer 5$4,193 USD
Retailer 8$4,537 USD
Retailer 3$4,545 USD
Retailer 2$4,586 USD
GemTrove$4,588 USD
Retailer 6$5,209 USD
Retailer 9$5,707 USD

28 data points across 9 retailers

1 retailer

B
GemTrove
GT-N-00943052-98 · Nov 6
$4,588 USD
A$7,058 AUD
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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
$4,588 USD