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Cushion|Natural|GIA

0.90ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 6285677170

Certificate GIA 6285677170

Diamond specifications and retailer prices

From €483 EUR
As of November 6, 2026
Save €1,653 EUR (77%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: €2,136 EUR at Adiamor · As of November 5, 2026
View at Adiamor

About this 0.9ct natural cushion diamond

This 0.9ct natural cushion sits in the just-under-one-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 6285677170. Listed at 16 retailers as of November 5, 2026, with prices from €483 to €2,136, a €1,653 spread on the same certified stone. Adiamor lists it at €2,136. 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

0.90
Carat
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6285677170
Dimensions5.26 × 5.21 × 3.84 mm
L/W Ratio1.01
Top View
5.26 mm5.21 mm0.90 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6285677170
Side View
Table 54.0%CrownGirdle: THK-THKPavilionCulet: NoneDepth 73.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: €1,290 EUR|Low: €483 EUR|High: €1,386 EUR|Avg: €897 EUR|-1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 7, 2026
Retailer 9€483 EUR
Retailer 2€516 EUR
Retailer 7€703 EUR
Retailer 4€708 EUR
Retailer 12€711 EUR
Retailer 14€718 EUR
Retailer 6€768 EUR
Retailer 15€795 EUR
Retailer 5€801 EUR
Retailer 8€843 EUR
Retailer 3€860 EUR
Retailer 11€995 EUR
Retailer 13€1,037 EUR
Retailer 1€1,290 EUR
Retailer 10€1,355 EUR

26 data points across 15 retailers

16 retailers€483 EUR to €2,136 EUR

A
Cheapest Retailer
-
€483 EUR
A
Retailer 2
-
€516 EUR
View
B+
Retailer 3
-
€703 EUR
View
Retailer 4
-
€708 EUR
View
Price last confirmed 9 days ago
B+
Retailer 5
-
€711 EUR
View
B+
Retailer 6
-
€718 EUR
View
B+
Retailer 7
-
€768 EUR
View
B+
Retailer 8
-
€795 EUR
View
B+
Retailer 9
-
€801 EUR
View
B+
Retailer 10
-
€843 EUR
View
B+
Retailer 11
-
€860 EUR
View
B+
Retailer 12
-
€995 EUR
View
B+
Retailer 13
-
€1,037 EUR
View
B
Retailer 14
-
€1,290 EUR
View
B
Retailer 15
-
€1,355 EUR
View
Most Expensive
B
Adiamor
D-51268865 · Nov 5
€2,136 EUR
$2,385 USD
View
15 more retailers have this diamond
Prices start from €483 EURSave up to €1,653 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.

A
0.90ct Cushion
€483 EUR