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Radiant|Lab Grown|IGI

1.00ct G SI1 Radiant Lab Grown Diamond

ID • G/SI1 • IGI LG512205189

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG512205189

Diamond specifications and retailer prices

From HK$4,723 HKD
$602 USD
As of October 30, 2026
Save HK$4,359 HKD (48%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: HK$15,393 HKD at NZ Jewellers · As of November 1, 2026
View at NZ Jewellers

About this 1ct lab-grown radiant diamond

This 1ct lab-grown radiant sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG512205189 or 512205189. Listed at 13 retailers as of October 30, 2026, with a 92% 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

1.00
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.2°
Pavilion angle31.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG512205189
Dimensions6.90 × 4.99 × 3.39 mm
L/W Ratio1.38
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
6.90 mm4.99 mm1.00 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG512205189
Side View
Table 68.0%Crown 36.2°Girdle: MED-STKPavilion 31.9°Culet: NoneDepth 67.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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$15,393 HKD|Low: HK$4,535 HKD|High: HK$25,717 HKD|Avg: HK$9,596 HKD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 7HK$4,723 HKD
Retailer 3HK$5,280 HKD
Retailer 11HK$5,288 HKD
Retailer 9HK$5,853 HKD
Retailer 8HK$6,747 HKD
Retailer 5HK$6,865 HKD
Retailer 10HK$8,975 HKD
Retailer 4HK$9,082 HKD
Retailer 6HK$14,522 HKD
NZ JewellersHK$15,393 HKD
Retailer 2HK$25,408 HKD

42 data points across 11 retailers

13 retailersHK$4,723 HKD to HK$9,082 HKD

B+
Cheapest Retailer
-
HK$4,723 HKD
$602 USD
B
Retailer 2
-
HK$5,280 HKD
$673 USD
View
Final sale: no returns
B
Retailer 3
-
HK$5,288 HKD
$674 USD
View
Retailer 4
-
HK$5,853 HKD
$746 USD
View
Price last confirmed 16 days ago
B
Retailer 5
-
HK$5,853 HKD
$746 USD
View
B
Retailer 6
-
HK$6,747 HKD
$860 USD
View
B
Retailer 7
-
HK$6,865 HKD
$875 USD
View
B
Retailer 8
-
HK$8,975 HKD
$1,144 USD
View
B
Retailer 9
-
HK$9,082 HKD
£911 GBP
View
Retailer 10
-
HK$14,522 HKD
$1,851 USD
View
Price under review
Most Expensive
NZ Jewellers
36276e34-7fa6-4876-9582-f00723faad04 · Nov 1
HK$15,393 HKD
$1,962 USD
View
Price under review
10 more retailers have this diamond
Prices start from HK$4,723 HKDSave up to HK$4,359 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.

B+
1.00ct Radiant
HK$4,723 HKD