Cushion|Lab Grown|IGI

17.78ct H VS1 Cushion Lab Grown Diamond

VG • H/VS1 • IGI LG629479691

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG629479691

Diamond specifications and retailer prices

From €8,614 EUR
£7,578 GBP
As of October 30, 2026
Save €24,143 EUR (74%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: €32,757 EUR at Taylor and Hart · As of October 30, 2026
View at Taylor and Hart

About this 17.78ct lab-grown cushion diamond

This 17.78ct lab-grown cushion sits in the over five carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG629479691 or 629479691. Listed at 14 retailers as of October 30, 2026, with prices from €8,614 to €32,757, a €24,143 spread on the same certified stone. Taylor and Hart lists it at €32,757. 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

17.78
Carat
H
Color
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.5°
Pavilion angle31.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG629479691
Dimensions14.78 × 14.54 × 9.31 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
14.78 mm14.54 mm17.78 ctH / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG629479691
Side View
Table 64.0%Crown 37.5°Girdle: THK-ETKPavilion 31.6°Culet: NoneDepth 64.0%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: €17,866 EUR|Low: €8,585 EUR|High: €32,757 EUR|Avg: €16,324 EUR|+2.9%
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
Taylor and Hart
October 31, 2026
Retailer 6€8,614 EUR
Retailer 5€9,833 EUR
Retailer 3€10,325 EUR
Retailer 2€10,562 EUR
Retailer 12€10,694 EUR
Retailer 11€10,762 EUR
Retailer 13€11,412 EUR
Retailer 8€15,262 EUR
Retailer 7€16,554 EUR
Retailer 1€17,866 EUR
Retailer 9€20,250 EUR
Retailer 10€23,568 EUR
Retailer 4€29,794 EUR
Taylor and Hart€32,757 EUR

35 data points across 14 retailers

14 retailers€8,614 EUR to €32,757 EUR

B+
Cheapest Retailer
-
€8,614 EUR
£7,578 GBP
B+
Retailer 2
-
€9,833 EUR
$10,986 USD
View
B+
Retailer 3
-
€10,325 EUR
$11,535 USD
View
Final sale: no returns
B
Retailer 4
-
€10,562 EUR
$11,800 USD
View
Retailer 5
-
€10,694 EUR
$11,947 USD
View
Price last confirmed 19 days ago
B
Retailer 6
-
€10,762 EUR
$12,023 USD
View
Retailer 7
-
€11,412 EUR
$12,750 USD
View
Price last confirmed 11 days ago
B
Retailer 8
-
€15,262 EUR
$17,051 USD
View
B
Retailer 9
-
€16,554 EUR
ZAR 298,769 ZAR
View
B
Retailer 10
-
€17,866 EUR
View
Retailer 11
-
€20,250 EUR
A$34,806 AUD
View
Price last confirmed 9 days ago
B
Retailer 12
-
€23,568 EUR
$26,330 USD
View
B
Retailer 13
-
€29,794 EUR
$33,286 USD
View
Most Expensive
B
Taylor and Hart
U0IXM1G · Oct 30
€32,757 EUR
$36,596 USD
View
13 more retailers have this diamond
Prices start from €8,614 EURSave up to €24,143 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+
17.78ct Cushion
€8,614 EUR