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Cushion|Lab Grown|IGI

1.51ct H SI1 Cushion Lab Grown Diamond

GD • H/SI1 • IGI LG459193109

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG459193109

Diamond specifications and retailer prices

From HK$2,142 HKD
$273 USD
As of November 1, 2026
Save HK$8,339 HKD (80%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: HK$91,743 HKD at Allurez · As of October 26, 2026
View at Allurez

About this 1.51ct lab-grown cushion diamond

This 1.51ct lab-grown cushion sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG459193109 or 459193109. Listed at 11 retailers as of November 1, 2026, with a 389% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.51
Carat
H
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle37.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG459193109
Dimensions7.08 × 6.59 × 4.27 mm
L/W Ratio1.07
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.08 mm6.59 mm1.51 ctH / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG459193109
Side View
Table 63.0%Crown 34.8°Girdle: MED-THKPavilion 37.8°Culet: NoneDepth 64.8%

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$6,237 HKD|Low: HK$1,946 HKD|High: HK$10,752 HKD|Avg: HK$5,223 HKD|-0.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 8HK$2,142 HKD
Retailer 2HK$2,487 HKD
Retailer 5HK$3,358 HKD
Retailer 7HK$3,719 HKD
Retailer 11HK$3,766 HKD
Retailer 3HK$3,839 HKD
Retailer 6HK$4,339 HKD
Retailer 1HK$6,237 HKD
Retailer 10HK$8,055 HKD
Retailer 4HK$9,536 HKD
Retailer 9HK$10,481 HKD

19 data points across 11 retailers

11 retailersHK$2,142 HKD to HK$10,481 HKD

A
Cheapest Retailer
-
HK$2,142 HKD
$273 USD
Final sale: no returns
Retailer 2
-
HK$2,487 HKD
$317 USD
View
Price last confirmed 8 days ago
B
Retailer 3
-
HK$3,358 HKD
$428 USD
View
B+
Retailer 4
-
HK$3,719 HKD
$474 USD
View
Retailer 5
-
HK$3,766 HKD
$480 USD
View
Price last confirmed 7 days ago
B+
Retailer 6
-
HK$4,339 HKD
$553 USD
View
B+
Retailer 7
-
HK$6,237 HKD
$795 USD
View
B+
Retailer 8
-
HK$8,055 HKD
$1,027 USD
View
B+
Retailer 9
-
HK$9,536 HKD
£957 GBP
View
B+
Retailer 10
-
HK$10,481 HKD
$1,336 USD
View
Most Expensive
Allurez
3132972 · Oct 26
HK$91,743 HKD
$11,693 USD
View
Price under review
10 more retailers have this diamond
Prices start from HK$2,142 HKDSave up to HK$8,339 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
1.51ct Cushion
HK$2,142 HKD