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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 $6,375 SGD
As of November 5, 2026
Save $724 SGD (10%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $7,098 SGD 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: $6,375 SGD|Low: $6,375 SGD|High: $7,175 SGD|Avg: $6,870 SGD|-1.0%
Retailer 1
Retailer 2
Retailer 3
Yorxs
November 6, 2026
Retailer 1$6,375 SGD
Retailer 2$6,907 SGD
Retailer 3$7,001 SGD
Yorxs$7,098 SGD

18 data points across 4 retailers

2 retailers$6,375 SGD to $7,098 SGD

B
Cheapest Retailer
-
$6,375 SGD
Most Expensive
B
Yorxs
227993512 · Nov 6
$7,098 SGD
€5,275 EUR
View
1 more retailer has this diamond
Prices start from $6,375 SGDSave up to $724 SGD

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
$6,375 SGD