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Round|Lab Grown|IGI

1.51ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • IGI LG731538751

Shape and cutting style on the report: Round brilliant

Certificate IGI LG731538751

Diamond specifications and retailer prices

From HK$1,647 HKD
As of November 5, 2026
Save HK$7,971 HKD (83%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: HK$12,395 HKD at Brilliant Earth · As of October 18, 2026
View at Brilliant Earth

About this 1.51ct lab-grown round diamond

This 1.51ct lab-grown round 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 LG731538751 or 731538751. Listed at 20 retailers as of November 5, 2026, with a 484% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG731538751
Dimensions7.31 × 7.27 × 4.58 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
7.31 mm7.27 mm1.51 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG731538751
Side View
Table 56.0%Crown 36°Girdle: THN-MEDPavilion 40.8°Culet: NoneDepth 62.8%

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 5
Current: HK$12,395 HKD|Low: HK$1,585 HKD|High: HK$12,395 HKD|Avg: HK$4,519 HKD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 10HK$1,647 HKD
Retailer 3HK$2,048 HKD
Retailer 11HK$2,762 HKD
Retailer 4HK$3,169 HKD
Retailer 2HK$3,436 HKD
Retailer 5HK$3,734 HKD
Retailer 9HK$4,527 HKD
Retailer 8HK$4,990 HKD
Retailer 7HK$5,962 HKD
Retailer 6HK$8,175 HKD
Brilliant EarthHK$12,395 HKD

41 data points across 11 retailers

20 retailersHK$1,647 HKD to HK$9,618 HKD

A
Cheapest Retailer
-
HK$1,647 HKD
A
Retailer 2
-
HK$1,844 HKD
View
Final sale: no returns
A
Retailer 3
-
HK$1,914 HKD
View
Retailer 4
-
HK$2,048 HKD
View
Price last confirmed 12 days ago
A
Retailer 5
-
HK$2,048 HKD
View
B+
Retailer 6
-
HK$2,762 HKD
View
A
Retailer 7
-
HK$3,169 HKD
View
A
Retailer 8
-
HK$3,436 HKD
View
A
Retailer 9
-
HK$3,475 HKD
View
A
Retailer 10
-
HK$3,734 HKD
View
B+
Retailer 11
-
HK$4,048 HKD
View
B+
Retailer 12
-
HK$4,527 HKD
View
B+
Retailer 13
-
HK$4,990 HKD
View
B
Retailer 14
-
HK$5,962 HKD
View
B
Retailer 15
-
HK$6,582 HKD
View
Retailer 16
-
HK$6,606 HKD
View
Price last confirmed 9 days ago
B
Retailer 17
-
HK$6,990 HKD
View
B
Retailer 18
-
HK$8,175 HKD
View
B
Retailer 19
-
HK$9,618 HKD
View
Most Expensive
Brilliant Earth
16956960A · Oct 18
HK$12,395 HKD
$1,580 USD
View
Price last confirmed 18 days ago
19 more retailers have this diamond
Prices start from HK$1,647 HKDSave up to HK$7,971 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 Round
HK$1,647 HKD