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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 $13,403 CAD
£7,555 GBP
As of November 1, 2026
Save $37,718 CAD (74%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $51,121 CAD at Taylor and Hart · As of October 31, 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 31, 2026, with prices from $13,403 to $51,121, a $37,718 spread on the same certified stone. Taylor and Hart lists it at $51,121. 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

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $13,403 CAD|Low: $13,398 CAD|High: $51,121 CAD|Avg: $25,470 CAD|-1.2%
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
November 1, 2026
Retailer 1$13,403 CAD
Retailer 5$15,346 CAD
Retailer 3$16,113 CAD
Retailer 2$16,483 CAD
Retailer 12$16,689 CAD
Retailer 11$16,795 CAD
Retailer 13$17,810 CAD
Retailer 9$23,819 CAD
Retailer 8$25,834 CAD
Retailer 7$27,881 CAD
Retailer 10$31,603 CAD
Retailer 6$35,844 CAD
Retailer 4$46,497 CAD
Taylor and Hart$51,121 CAD

36 data points across 14 retailers

14 retailers$13,403 CAD to $51,121 CAD

B+
Cheapest Retailer
-
$13,403 CAD
£7,555 GBP
B+
Retailer 2
-
$15,346 CAD
$10,986 USD
View
B+
Retailer 3
-
$16,113 CAD
$11,535 USD
View
Final sale: no returns
B
Retailer 4
-
$16,483 CAD
$11,800 USD
View
Retailer 5
-
$16,689 CAD
$11,947 USD
View
Price last confirmed 19 days ago
B
Retailer 6
-
$16,795 CAD
$12,023 USD
View
Retailer 7
-
$17,810 CAD
$12,750 USD
View
Price last confirmed 11 days ago
B
Retailer 8
-
$23,819 CAD
$17,051 USD
View
B
Retailer 9
-
$25,834 CAD
ZAR 298,769 ZAR
View
B
Retailer 10
-
$27,881 CAD
€19,009 EUR
View
Retailer 11
-
$31,603 CAD
A$34,806 AUD
View
Price last confirmed 9 days ago
B
Retailer 12
-
$35,844 CAD
$25,660 USD
View
B
Retailer 13
-
$46,497 CAD
$33,286 USD
View
Most Expensive
B
Taylor and Hart
U0IXM1G · Oct 31
$51,121 CAD
$36,596 USD
View
13 more retailers have this diamond
Prices start from $13,403 CADSave up to $37,718 CAD

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
$13,403 CAD