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Cushion|Natural|GIA

1.80ct K SI1 Cushion Natural Diamond

VG • K/SI1 • GIA 2426704822

Certificate GIA 2426704822

Diamond specifications and retailer prices

From €4,455 EUR
As of November 5, 2026
Save €506 EUR (10%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: €4,961 EUR at Yorxs · As of November 6, 2026
View at Yorxs

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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 2426704822. Listed at 2 retailers as of November 5, 2026, with a relatively tight 11% spread, which is unusual at this carat range and suggests competitive pricing across the listings. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.80
Carat
K
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2426704822
Dimensions6.78 × 6.42 × 4.83 mm
L/W Ratio1.06
Top View
6.78 mm6.42 mm1.80 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2426704822
Side View
Table 59.0%CrownGirdle: VTK-ETKPavilionCulet: NoneDepth 75.2%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 5
Current: €4,455 EUR|Low: €4,455 EUR|High: €5,014 EUR|Avg: €4,801 EUR|-1.0%
Retailer 1
Retailer 2
Retailer 3
Yorxs
November 6, 2026
Retailer 1€4,455 EUR
Retailer 2€4,827 EUR
Retailer 3€4,893 EUR
Yorxs€4,961 EUR

18 data points across 4 retailers

2 retailers€4,455 EUR to €4,961 EUR

B
Cheapest Retailer
-
€4,455 EUR
Most Expensive
B
Yorxs
227993512 · Nov 6
€4,961 EUR
View
1 more retailer has this diamond
Prices start from €4,455 EURSave up to €506 EUR

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
€4,455 EUR