Radiant|Lab Grown|IGI

1.25ct G SI1 Radiant Lab Grown Diamond

ID • G/SI1 • IGI LG512205072

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

Certificate IGI LG512205072

Diamond specifications and retailer prices

From €667 EUR
$745 USD
As of October 30, 2026
Save €1,508 EUR (69%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €3,053 EUR at MOH London · As of October 29, 2026
View at MOH London

About this 1.25ct lab-grown radiant diamond

This 1.25ct lab-grown radiant sits in the one-and-a-quarter to one-and-a-half carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG512205072 or 512205072. Listed at 13 retailers as of October 30, 2026, with a 226% 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

1.25
Carat
G
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.7°
Pavilion angle29.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG512205072
Dimensions7.31 × 5.41 × 3.51 mm
L/W Ratio1.35
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
7.31 mm5.41 mm1.25 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG512205072
Side View
Table 66.0%Crown 46.7°Girdle: MED-STKPavilion 29.7°Culet: NoneDepth 64.9%

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: €3,053 EUR|Low: €640 EUR|High: €3,074 EUR|Avg: €1,375 EUR|-0.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 31, 2026
Retailer 7€667 EUR
Retailer 12€726 EUR
Retailer 3€746 EUR
Retailer 9€773 EUR
Retailer 5€931 EUR
Retailer 8€967 EUR
Retailer 2€1,242 EUR
Retailer 11€1,252 EUR
Retailer 6€1,905 EUR
Retailer 10€2,175 EUR
Retailer 4€2,406 EUR
MOH London€3,053 EUR

40 data points across 12 retailers

13 retailers€667 EUR to €2,175 EUR

B+
Cheapest Retailer
-
€667 EUR
$745 USD
B+
Retailer 2
-
€726 EUR
$811 USD
View
B
Retailer 3
-
€746 EUR
$833 USD
View
Final sale: no returns
B
Retailer 4
-
€773 EUR
$864 USD
View
Retailer 5
-
€773 EUR
$864 USD
View
Price last confirmed 20 days ago
B
Retailer 6
-
€931 EUR
$1,040 USD
View
B
Retailer 7
-
€967 EUR
$1,080 USD
View
B
Retailer 8
-
€1,242 EUR
£1,093 GBP
View
B
Retailer 9
-
€1,252 EUR
$1,399 USD
View
B
Retailer 10
-
€1,905 EUR
$2,128 USD
View
B
Retailer 11
-
€2,175 EUR
$2,430 USD
View
Retailer 12
-
€2,406 EUR
$2,688 USD
View
Price under review
Most Expensive
MOH London
LG512205072 · Oct 29
€3,053 EUR
£2,686 GBP
View
Price under review
12 more retailers have this diamond
Prices start from €667 EURSave up to €1,508 EUR

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+
1.25ct Radiant
€667 EUR