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Cushion|Lab Grown|IGI

1.39ct D SI1 Cushion Lab Grown Diamond

GD • D/SI1 • IGI LG683579698

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG683579698

Diamond specifications and retailer prices

From HK$3,439 HKD
£345 GBP
As of October 30, 2026
Save HK$14,606 HKD (81%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: HK$18,045 HKD at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 1.39ct lab-grown cushion diamond

This 1.39ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG683579698 or 683579698. Listed at 8 retailers as of October 30, 2026, with prices from HK$3,439 to HK$18,045, a HK$14,606 spread on the same certified stone. Do Amore Diamonds lists it at HK$18,045. 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

1.39
Carat
D
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle37.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG683579698
Dimensions6.66 × 6.42 × 4.20 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
6.66 mm6.42 mm1.39 ctD / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG683579698
Side View
Table 57.0%Crown 36.3°Girdle: MED-STKPavilion 37.6°Culet: NoneDepth 65.4%

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: HK$18,045 HKD|Low: HK$3,427 HKD|High: HK$18,594 HKD|Avg: HK$6,994 HKD
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 3HK$3,439 HKD
Retailer 2HK$3,805 HKD
Retailer 8HK$3,805 HKD
Retailer 6HK$4,299 HKD
Retailer 7HK$4,613 HKD
Retailer 9HK$5,244 HKD
Retailer 5HK$7,061 HKD
Retailer 4HK$11,538 HKD
Do Amore DiamondsHK$18,045 HKD

33 data points across 9 retailers

8 retailersHK$3,439 HKD to HK$18,045 HKD

A
Cheapest Retailer
-
HK$3,439 HKD
£345 GBP
B+
Retailer 2
-
HK$3,805 HKD
$485 USD
View
A
Retailer 3
-
HK$3,805 HKD
$485 USD
View
B+
Retailer 4
-
HK$4,299 HKD
$548 USD
View
B+
Retailer 5
-
HK$4,613 HKD
$588 USD
View
Retailer 6
-
HK$7,061 HKD
$900 USD
View
Price last confirmed 10 days ago
B
Retailer 7
-
HK$11,538 HKD
£1,158 GBP
View
Most Expensive
C
Do Amore Diamonds
7-1681876 · Oct 31
HK$18,045 HKD
$2,300 USD
View
7 more retailers have this diamond
Prices start from HK$3,439 HKDSave up to HK$14,606 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
1.39ct Cushion
HK$3,439 HKD