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Cushion|Lab Grown|IGI

4.50ct G SI1 Cushion Lab Grown Diamond

VG • G/SI1 • IGI LG811636021

Shape and cutting style on the report: Antique cushion cut

Certificate IGI LG811636021

Diamond specifications and retailer prices

From HK$8,003 HKD
$1,020 USD
As of November 1, 2026
Save HK$20,811 HKD (72%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: HK$28,814 HKD at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 4.5ct lab-grown cushion diamond

This 4.5ct lab-grown cushion sits in the three to five carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG811636021 or 811636021. Listed at 9 retailers as of October 31, 2026, with prices from HK$8,003 to HK$28,814, a HK$20,811 spread on the same certified stone. Taylor and Hart lists it at HK$28,814. 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

4.50
Carat
G
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle38.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG811636021
Dimensions11.76 × 8.54 × 5.47 mm
L/W Ratio1.38
Girdle conditionFaceted
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.76 mm8.54 mm4.50 ctG / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG811636021
Side View
Table 54.0%Crown 36.5°Girdle: STK-THKPavilion 38.3°Culet: LargeDepth 64.1%

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: Nov 1
Current: HK$12,766 HKD|Low: HK$8,003 HKD|High: HK$28,814 HKD|Avg: HK$18,965 HKD|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Taylor and Hart
November 2, 2026
Retailer 7HK$8,003 HKD
Retailer 2HK$9,650 HKD
Retailer 6HK$11,863 HKD
Retailer 1HK$12,766 HKD
Retailer 4HK$18,445 HKD
Retailer 5HK$24,361 HKD
Retailer 8HK$27,833 HKD
Retailer 3HK$28,268 HKD
Taylor and HartHK$28,814 HKD

28 data points across 9 retailers

9 retailersHK$8,003 HKD to HK$28,814 HKD

A
Cheapest Retailer
-
HK$8,003 HKD
$1,020 USD
Final sale: no returns
B+
Retailer 2
-
HK$9,650 HKD
$1,230 USD
View
B+
Retailer 3
-
HK$11,863 HKD
$1,512 USD
View
B+
Retailer 4
-
HK$12,766 HKD
£1,281 GBP
View
B
Retailer 5
-
HK$18,445 HKD
$2,351 USD
View
B
Retailer 6
-
HK$24,361 HKD
$3,105 USD
View
B
Retailer 7
-
HK$27,833 HKD
SGD 4,794 SGD
View
B
Retailer 8
-
HK$28,268 HKD
£2,837 GBP
View
Most Expensive
B
Taylor and Hart
E8F42E0 · Oct 31
HK$28,814 HKD
$3,673 USD
View
8 more retailers have this diamond
Prices start from HK$8,003 HKDSave up to HK$20,811 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.

A
4.50ct Cushion
HK$8,003 HKD