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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 HK$75,279 HKD
£7,555 GBP
As of November 2, 2026
Save HK$211,859 HKD (74%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: HK$287,138 HKD 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 HK$75,279 to HK$287,138, a HK$211,859 spread on the same certified stone. Taylor and Hart lists it at HK$287,138. 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
Colour
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 2
Current: HK$75,279 HKD|Low: HK$75,257 HKD|High: HK$287,138 HKD|Avg: HK$143,043 HKD|-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 2, 2026
Retailer 1HK$75,279 HKD
Retailer 5HK$86,197 HKD
Retailer 3HK$90,505 HKD
Retailer 2HK$92,584 HKD
Retailer 12HK$93,737 HKD
Retailer 11HK$94,334 HKD
Retailer 13HK$100,038 HKD
Retailer 10HK$133,784 HKD
Retailer 9HK$145,104 HKD
Retailer 8HK$156,604 HKD
Retailer 6HK$177,214 HKD
Retailer 7HK$201,331 HKD
Retailer 4HK$261,162 HKD
Taylor and HartHK$287,138 HKD

37 data points across 14 retailers

14 retailersHK$75,279 HKD to HK$287,138 HKD

B+
Cheapest Retailer
-
HK$75,279 HKD
£7,555 GBP
B+
Retailer 2
-
HK$86,197 HKD
$10,986 USD
View
B+
Retailer 3
-
HK$90,505 HKD
$11,535 USD
View
Final sale: no returns
B
Retailer 4
-
HK$92,584 HKD
$11,800 USD
View
Retailer 5
-
HK$93,737 HKD
$11,947 USD
View
Price last confirmed 20 days ago
B
Retailer 6
-
HK$94,334 HKD
$12,023 USD
View
B+
Retailer 7
-
HK$100,038 HKD
$12,750 USD
View
B
Retailer 8
-
HK$133,784 HKD
$17,051 USD
View
B
Retailer 9
-
HK$145,104 HKD
ZAR 298,769 ZAR
View
B
Retailer 10
-
HK$156,604 HKD
€19,009 EUR
View
B
Retailer 11
-
HK$177,214 HKD
A$34,748 AUD
View
B
Retailer 12
-
HK$201,331 HKD
$25,660 USD
View
B
Retailer 13
-
HK$261,162 HKD
$33,286 USD
View
Most Expensive
B
Taylor and Hart
U0IXM1G · Oct 31
HK$287,138 HKD
$36,596 USD
View
13 more retailers have this diamond
Prices start from HK$75,279 HKDSave up to HK$211,859 HKD

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
HK$75,279 HKD