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Round|Lab Grown|IGI

1.00ct I SI1 Round Lab Grown Diamond

EX • I/SI1 • IGI LG451057017

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451057017

Diamond specifications and retailer prices

From €519 EUR
$580 USD
As of October 31, 2026
Save €3,220 EUR (86%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: €3,739 EUR at MOH London · As of October 29, 2026
View at MOH London

About this 1ct lab-grown round diamond

This 1ct lab-grown round sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451057017 or 451057017. Listed at 12 retailers as of October 29, 2026, with prices from €519 to €3,739, a €3,220 spread on the same certified stone. MOH London lists it at €3,739. 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
I
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.8°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451057017
Dimensions6.38 × 6.41 × 3.94 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
undefined
Top View
6.38 mm6.41 mm1.00 ctI / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451057017
Side View
Table 54.0%Crown 32.8°Girdle: UNDPavilion 40.3°Culet: NoneDepth 61.5%

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: Oct 31
Current: €3,739 EUR|Low: €519 EUR|High: €3,770 EUR|Avg: €1,757 EUR|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 30, 2026
Retailer 2€519 EUR
Retailer 7€998 EUR
Retailer 11€1,086 EUR
Retailer 10€1,116 EUR
Retailer 8€1,157 EUR
Retailer 13€1,311 EUR
Retailer 3€1,638 EUR
Retailer 12€1,677 EUR
Retailer 9€1,841 EUR
Retailer 6€1,984 EUR
Retailer 4€2,348 EUR
Retailer 5€3,315 EUR
MOH London€3,739 EUR

19 data points across 13 retailers

12 retailers€519 EUR to €3,739 EUR

A
Cheapest Retailer
-
€519 EUR
$580 USD
B+
Retailer 2
-
€998 EUR
$1,115 USD
View
B+
Retailer 3
-
€1,086 EUR
$1,213 USD
View
B+
Retailer 4
-
€1,116 EUR
$1,247 USD
View
Final sale: no returns
B+
Retailer 5
-
€1,157 EUR
$1,293 USD
View
Retailer 6
-
€1,157 EUR
$1,293 USD
View
Price last confirmed 19 days ago
B
Retailer 7
-
€1,311 EUR
$1,465 USD
View
B
Retailer 8
-
€1,841 EUR
$2,057 USD
View
B
Retailer 9
-
€1,984 EUR
View
B
Retailer 10
-
€2,170 EUR
$2,424 USD
View
B
Retailer 11
-
€2,348 EUR
$2,623 USD
View
Most Expensive
B
MOH London
LG451057017 · Oct 29
€3,739 EUR
£3,289 GBP
View
11 more retailers have this diamond
Prices start from €519 EURSave up to €3,220 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.

A
1.00ct Round
€519 EUR