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Round|Lab Grown|IGI

1.00ct I VS1 Round Lab Grown Diamond

VG • I/VS1 • IGI LG418021821

Shape and cutting style on the report: Round brilliant

Certificate IGI LG418021821

Diamond specifications and retailer prices

From $322 USD
As of October 30, 2026
Save $483 USD (60%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $805 USD 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 VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG418021821 or 418021821. Listed at 4 retailers as of October 29, 2026, with prices from $322 to $805, a $483 spread on the same certified stone. MOH London lists it at $805. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.00
Carat
I
Color
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
Crown angle37.5°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG418021821
Dimensions6.26 × 6.20 × 3.96 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory grown diamond was created by high pressure high temperature process (HPHT).
Top View
6.26 mm6.20 mm1.00 ctI / VS1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateIGI LG418021821
Side View
Table 59.0%Crown 37.5°Girdle: ThickPavilion 40.2°Culet: NoneDepth 63.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $805 USD|Low: $232 USD|High: $881 USD|Avg: $468 USD|-8.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 18, 2026
Retailer 2$322 USD
Retailer 5$381 USD
Retailer 3$416 USD
Retailer 4$447 USD
Retailer 6$472 USD
MOH London$805 USD

12 data points across 6 retailers

4 retailers$322 USD to $805 USD

B+
Cheapest Retailer
-
$322 USD
B+
Retailer 2
-
$416 USD
View
B
Retailer 3
-
$447 USD
View
Most Expensive
B
MOH London
LG418021821 · Oct 29
$805 USD
£634 GBP
View
3 more retailers have this diamond
Prices start from $322 USDSave up to $483 USD

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 Round
$322 USD