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Oval|Lab Grown|IGI

1.66ct D SI1 Oval Lab Grown Diamond

ID • D/SI1 • IGI LG520284681

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG520284681

Diamond specifications and retailer prices

From HK$1,718 HKD
$219 USD
As of November 1, 2026
Save HK$8,325 HKD (83%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: HK$10,043 HKD at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 1.66ct lab-grown oval diamond

This 1.66ct lab-grown oval 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 LG520284681 or 520284681. Listed at 17 retailers as of November 1, 2026, with prices from HK$1,718 to HK$10,043, a HK$8,325 spread on the same certified stone. Brilliant Earth lists it at HK$10,043. 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

1.66
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle39.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG520284681
Dimensions9.55 × 6.80 × 4.10 mm
L/W Ratio1.40
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
9.55 mm6.80 mm1.66 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG520284681
Side View
Table 60.5%Crown 36.5°Girdle: MED-STKPavilion 39.4°Culet: NoneDepth 60.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: HK$10,043 HKD|Low: HK$1,718 HKD|High: HK$10,043 HKD|Avg: HK$4,992 HKD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 2, 2026
Retailer 8HK$1,718 HKD
Retailer 6HK$1,922 HKD
Retailer 5HK$1,993 HKD
Retailer 14HK$2,126 HKD
Retailer 2HK$2,370 HKD
Retailer 16HK$2,864 HKD
Retailer 9HK$3,955 HKD
Retailer 12HK$4,144 HKD
Retailer 15HK$4,166 HKD
Retailer 4HK$4,582 HKD
Retailer 3HK$6,842 HKD
Retailer 13HK$6,865 HKD
Retailer 7HK$7,258 HKD
Retailer 10HK$7,611 HKD
Retailer 11HK$8,530 HKD
Brilliant EarthHK$10,043 HKD

36 data points across 16 retailers

17 retailersHK$1,718 HKD to HK$10,043 HKD

A
Cheapest Retailer
-
HK$1,718 HKD
$219 USD
A
Retailer 2
-
HK$1,922 HKD
$245 USD
View
Final sale: no returns
A
Retailer 3
-
HK$1,993 HKD
$254 USD
View
A
Retailer 4
-
HK$2,126 HKD
$271 USD
View
Retailer 5
-
HK$2,299 HKD
$293 USD
View
Price last confirmed 8 days ago
A
Retailer 6
-
HK$2,370 HKD
£238 GBP
View
B+
Retailer 7
-
HK$2,864 HKD
$365 USD
View
A
Retailer 8
-
HK$3,955 HKD
£397 GBP
View
A
Retailer 9
-
HK$4,144 HKD
€503 EUR
View
A
Retailer 10
-
HK$4,166 HKD
$531 USD
View
B+
Retailer 11
-
HK$4,582 HKD
$584 USD
View
B+
Retailer 12
-
HK$6,842 HKD
$872 USD
View
B+
Retailer 13
-
HK$6,865 HKD
$875 USD
View
B+
Retailer 14
-
HK$7,258 HKD
$925 USD
View
B+
Retailer 15
-
HK$7,611 HKD
$970 USD
View
B
Retailer 16
-
HK$8,530 HKD
£856 GBP
View
Most Expensive
B
Brilliant Earth
11225627A · Nov 2
HK$10,043 HKD
$1,280 USD
View
16 more retailers have this diamond
Prices start from HK$1,718 HKDSave up to HK$8,325 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
1.66ct Oval
HK$1,718 HKD