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Cushion|Lab Grown|IGI

1.51ct G SI1 Cushion Lab Grown Diamond

ID • G/SI1 • IGI LG459119539

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG459119539

Diamond specifications and retailer prices

From HK$1,914 HKD
$244 USD
As of November 1, 2026
Save HK$14,013 HKD (88%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: HK$15,928 HKD at Do Amore Diamonds · As of November 2, 2026
View at Do Amore Diamonds

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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG459119539 or 459119539. Listed at 13 retailers as of November 1, 2026, with prices from HK$1,914 to HK$15,928, a HK$14,013 spread on the same certified stone. Do Amore Diamonds lists it at HK$15,928. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle35.5°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG459119539
Dimensions6.63 × 6.39 × 4.55 mm
L/W Ratio1.04
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
6.63 mm6.39 mm1.51 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG459119539
Side View
Table 63.5%Crown 35.5°Girdle: MED-THKPavilion 39.7°Culet: NoneDepth 71.2%

Caratlytics Score

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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$4,240 HKD|Low: HK$1,914 HKD|High: HK$9,187 HKD|Avg: HK$4,558 HKD|+3.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 7HK$1,914 HKD
Retailer 9HK$2,934 HKD
Retailer 4HK$3,201 HKD
Retailer 2HK$3,798 HKD
Retailer 6HK$4,056 HKD
Retailer 1HK$4,240 HKD
Retailer 8HK$4,952 HKD
Retailer 5HK$7,846 HKD
Retailer 3HK$9,128 HKD

43 data points across 9 retailers

13 retailersHK$1,914 HKD to HK$15,928 HKD

A
Cheapest Retailer
-
HK$1,914 HKD
$244 USD
Final sale: no returns
A
Retailer 2
-
HK$2,934 HKD
$374 USD
View
B+
Retailer 3
-
HK$3,201 HKD
$408 USD
View
A
Retailer 4
-
HK$3,214 HKD
View
A
Retailer 5
-
HK$3,798 HKD
€461 EUR
View
A
Retailer 6
-
HK$4,056 HKD
$517 USD
View
A
Retailer 7
-
HK$4,240 HKD
£426 GBP
View
B+
Retailer 8
-
HK$4,952 HKD
$631 USD
View
B
Retailer 9
-
HK$7,846 HKD
$1,000 USD
View
B
Retailer 10
-
HK$8,628 HKD
$1,100 USD
View
B
Retailer 11
-
HK$9,128 HKD
£916 GBP
View
B
Retailer 12
-
HK$9,261 HKD
SGD 1,595 SGD
View
Most Expensive
B
Do Amore Diamonds
27-7E8361953 · Nov 2
HK$15,928 HKD
$2,030 USD
View
12 more retailers have this diamond
Prices start from HK$1,914 HKDSave up to HK$14,013 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$1,914 HKD