Cushion|Lab Grown|GIA

1.05ct E SI1 Cushion Lab Grown Diamond

VG • E/SI1 • GIA 6505612888

Certificate GIA 6505612888

Diamond specifications and retailer prices

From $580 USD
As of October 30, 2026
Save $120 USD (17%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $700 USD at Kay Jewelers · As of October 28, 2026
View at Kay Jewelers

About this 1.05ct lab-grown cushion diamond

This 1.05ct lab-grown cushion sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6505612888. Listed at 4 retailers as of October 28, 2026, with prices from $580 to $700, a $120 spread on the same certified stone. Kay Jewelers lists it at $700. 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

1.05
Carat
E
Color
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginLab Grown
Grading LabGIA
CertificateGIA 6505612888
Dimensions6.96 × 5.65 × 3.56 mm
L/W Ratio1.23
Top View
6.96 mm5.65 mm1.05 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6505612888
Side View
Table 58.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 62.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 30
Current: $700 USD|Low: $580 USD|High: $900 USD|Avg: $761 USD|-22.2%
Kay Jewelers
Retailer 2
Retailer 3
Retailer 4
September 26, 2026
Retailer 4$580 USD
Retailer 2$584 USD
Kay Jewelers$700 USD
Retailer 3$700 USD

10 data points across 4 retailers

4 retailers$580 USD to $700 USD

B+
Cheapest Retailer
-
$580 USD
B+
Retailer 2
-
$584 USD
View
B
Retailer 3
-
$700 USD
View
Most Expensive
B
Kay Jewelers
252622113 · Oct 28
$700 USD
View
3 more retailers have this diamond
Prices start from $580 USDSave up to $120 USD

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+
1.05ct Cushion
$580 USD