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Round|Lab Grown|IGI

1.21ct F SI1 Round Lab Grown Diamond

VG • F/SI1 • IGI LG763668397

Shape and cutting style on the report: Round brilliant

Certificate IGI LG763668397

Diamond specifications and retailer prices

From €144 EUR
$161 USD
As of November 1, 2026
Save €686 EUR (83%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: €830 EUR at MOH London · As of November 1, 2026
View at MOH London

About this 1.21ct lab-grown round diamond

This 1.21ct lab-grown round sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG763668397 or 763668397. Listed at 14 retailers as of November 1, 2026, with prices from €144 to €830, a €686 spread on the same certified stone. MOH London lists it at €830. 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

1.21
Carat
F
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
Crown angle36.1°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG763668397
Dimensions6.92 × 6.90 × 4.05 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.92 mm6.90 mm1.21 ctF / SI1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateIGI LG763668397
Side View
Table 60.0%Crown 36.1°Girdle: MED-STKPavilion 39.7°Culet: NoneDepth 58.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: €830 EUR|Low: €136 EUR|High: €854 EUR|Avg: €388 EUR|-2.8%
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
Retailer 14
November 2, 2026
Retailer 11€144 EUR
Retailer 12€160 EUR
Retailer 5€177 EUR
Retailer 4€177 EUR
Retailer 7€307 EUR
Retailer 8€309 EUR
Retailer 14€320 EUR
Retailer 3€329 EUR
Retailer 13€400 EUR
Retailer 10€432 EUR
Retailer 2€485 EUR
Retailer 9€490 EUR
Retailer 6€654 EUR
MOH London€830 EUR

35 data points across 14 retailers

14 retailers€144 EUR to €830 EUR

A
Cheapest Retailer
-
€144 EUR
$161 USD
A
Retailer 2
-
€160 EUR
$180 USD
View
Final sale: no returns
Retailer 3
-
€177 EUR
$198 USD
View
Price last confirmed 48 days ago
Retailer 4
-
€177 EUR
$199 USD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
€307 EUR
View
B+
Retailer 6
-
€309 EUR
£273 GBP
View
B
Retailer 7
-
€320 EUR
$359 USD
View
B+
Retailer 8
-
€329 EUR
$369 USD
View
B+
Retailer 9
-
€400 EUR
$449 USD
View
B
Retailer 10
-
€432 EUR
$485 USD
View
B
Retailer 11
-
€485 EUR
$544 USD
View
B
Retailer 12
-
€490 EUR
$550 USD
View
Retailer 13
-
€548 EUR
$615 USD
View
Price last confirmed 48 days ago
Most Expensive
B
MOH London
LG763668397 · Nov 1
€830 EUR
£733 GBP
View
13 more retailers have this diamond
Prices start from €144 EURSave up to €686 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
1.21ct Round
€144 EUR