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Cushion|Lab Grown|IGI

17.20ct H VS1 Cushion Lab Grown Diamond

ID • H/VS1 • IGI LG626438688

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG626438688

Diamond specifications and retailer prices

From £6,953 GBP
As of October 30, 2026
Save £19,831 GBP (74%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £26,785 GBP at Taylor and Hart · As of October 30, 2026
View at Taylor and Hart

About this 17.2ct lab-grown cushion diamond

This 17.2ct lab-grown cushion sits in the over five carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG626438688 or 626438688. Listed at 13 retailers as of October 30, 2026, with prices from £6,953 to £26,785, a £19,831 spread on the same certified stone. Taylor and Hart lists it at £26,785. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

17.20
Carat
H
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle30.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG626438688
Dimensions14.66 × 14.46 × 8.89 mm
L/W Ratio1.01
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
14.66 mm14.46 mm17.20 ctH / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG626438688
Side View
Table 59.0%Crown 34.3°Girdle: THK-VTKPavilion 30.9°Culet: NoneDepth 61.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £14,411 GBP|Low: £6,930 GBP|High: £26,785 GBP|Avg: £13,086 GBP|+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£6,953 GBP
Retailer 4£7,944 GBP
Retailer 2£8,333 GBP
Retailer 13£8,531 GBP
Retailer 11£8,631 GBP
Retailer 10£8,680 GBP
Retailer 12£9,214 GBP
Retailer 8£12,002 GBP
Retailer 7£13,361 GBP
Retailer 5£13,661 GBP
Retailer 1£14,411 GBP
Retailer 9£18,531 GBP
Retailer 3£24,047 GBP
Taylor and Hart£26,785 GBP

34 data points across 14 retailers

13 retailers£6,953 GBP to £26,785 GBP

A
Cheapest Retailer
-
£6,953 GBP
B+
Retailer 2
-
£7,944 GBP
$10,644 USD
View
B+
Retailer 3
-
£8,333 GBP
$11,165 USD
View
Final sale: no returns
B+
Retailer 4
-
£8,531 GBP
$11,430 USD
View
Retailer 5
-
£8,631 GBP
$11,565 USD
View
Price last confirmed 19 days ago
B+
Retailer 6
-
£8,680 GBP
$11,630 USD
View
Retailer 7
-
£9,214 GBP
$12,346 USD
View
Price last confirmed 10 days ago
B
Retailer 8
-
£12,002 GBP
$16,082 USD
View
B
Retailer 9
-
£13,361 GBP
ZAR 289,221 ZAR
View
B
Retailer 10
-
£14,411 GBP
€18,390 EUR
View
B
Retailer 11
-
£18,531 GBP
$24,830 USD
View
B
Retailer 12
-
£24,047 GBP
$32,220 USD
View
Most Expensive
B
Taylor and Hart
TYVKW0T · Oct 30
£26,785 GBP
$35,888 USD
View
12 more retailers have this diamond
Prices start from £6,953 GBPSave up to £19,831 GBP

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
17.20ct Cushion
£6,953 GBP