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Cushion|Lab Grown|IGI

1.67ct D SI1 Cushion Lab Grown Diamond

EX • D/SI1 • IGI LG508138247

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG508138247

Diamond specifications and retailer prices

From HK$2,487 HKD
$317 USD
As of November 1, 2026
Save HK$11,321 HKD (82%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: HK$13,808 HKD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.67ct lab-grown cushion diamond

This 1.67ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG508138247 or 508138247. Listed at 11 retailers as of October 31, 2026, with prices from HK$2,487 to HK$13,808, a HK$11,321 spread on the same certified stone. Brilliant Earth lists it at HK$13,808. 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

1.67
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle32.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG508138247
Dimensions7.01 × 6.61 × 4.24 mm
L/W Ratio1.06
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
7.01 mm6.61 mm1.67 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG508138247
Side View
Table 57.0%Crown 36°Girdle: MED-THKPavilion 32.9°Culet: NoneDepth 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$13,808 HKD|Low: HK$2,487 HKD|High: HK$17,496 HKD|Avg: HK$6,259 HKD|-18.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 9HK$2,487 HKD
Retailer 8HK$2,754 HKD
Retailer 6HK$3,962 HKD
Retailer 5HK$4,001 HKD
Retailer 4HK$4,506 HKD
Retailer 3HK$4,809 HKD
Retailer 2HK$4,864 HKD
Retailer 11HK$5,437 HKD
Retailer 10HK$8,848 HKD
Retailer 7HK$11,060 HKD
Brilliant EarthHK$13,808 HKD

41 data points across 11 retailers

11 retailersHK$2,487 HKD to HK$13,808 HKD

A
Cheapest Retailer
-
HK$2,487 HKD
$317 USD
Final sale: no returns
Retailer 2
-
HK$2,754 HKD
$351 USD
View
Price last confirmed 17 days ago
A
Retailer 3
-
HK$3,962 HKD
$505 USD
View
A
Retailer 4
-
HK$4,001 HKD
$510 USD
View
A
Retailer 5
-
HK$4,506 HKD
€547 EUR
View
B+
Retailer 6
-
HK$4,809 HKD
$613 USD
View
A
Retailer 7
-
HK$4,864 HKD
£488 GBP
View
B+
Retailer 8
-
HK$5,437 HKD
$693 USD
View
Retailer 9
-
HK$8,848 HKD
SGD 1,524 SGD
View
Price last confirmed 20 days ago
B
Retailer 10
-
HK$11,060 HKD
£1,110 GBP
View
Most Expensive
B
Brilliant Earth
20666774A · Oct 31
HK$13,808 HKD
$1,760 USD
View
10 more retailers have this diamond
Prices start from HK$2,487 HKDSave up to HK$11,321 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
1.67ct Cushion
HK$2,487 HKD