Cushion|Lab Grown|IGI

1.00ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG851605828

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG851605828

Diamond specifications and retailer prices

From $212 USD
As of October 30, 2026
Save $348 USD (62%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $560 USD at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 1ct lab-grown cushion diamond

This 1ct lab-grown cushion sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG851605828 or 851605828. Listed at 4 retailers as of October 30, 2026, with prices from $212 to $560, a $348 spread on the same certified stone. Taylor and Hart lists it at $560. 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

1.00
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle37°
OriginLab Grown
Grading LabIGI
CertificateIGI LG851605828
Dimensions7.05 × 5.15 × 3.41 mm
L/W Ratio1.37
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.05 mm5.15 mm1.00 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG851605828
Side View
Table 69.0%Crown 34.6°Girdle: MED-THKPavilion 37°Culet: NoneDepth 66.2%

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: Oct 30
Current: $279 USD|Low: $212 USD|High: $560 USD|Avg: $304 USD
Retailer 1
Retailer 2
Retailer 3
Taylor and Hart
October 31, 2026
Retailer 3$212 USD
Retailer 2$258 USD
Retailer 1$279 USD
Taylor and Hart$560 USD

2 data points across 4 retailers

4 retailers$212 USD to $560 USD

B+
Cheapest Retailer
-
$212 USD
A
Retailer 2
-
$258 USD
£203 GBP
View
A
Retailer 3
-
$279 USD
View
Most Expensive
B
Taylor and Hart
XGFZ2PI · Oct 31
$560 USD
View
3 more retailers have this diamond
Prices start from $212 USDSave up to $348 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.

A
1.00ct Cushion
$212 USD