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Round|Lab Grown|IGI

1.21ct E VS1 Round Lab Grown Diamond

ID • E/VS1 • IGI LG720540135

Shape and cutting style on the report: Round brilliant

Certificate IGI LG720540135

Diamond specifications and retailer prices

From €155 EUR
$172 USD
As of October 29, 2026
Save €839 EUR (84%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: €1,871 EUR at Queensmith · As of October 27, 2026
View at Queensmith

About this 1.21ct lab-grown round diamond

This 1.21ct lab-grown round sits in the classic one-carat band, graded E colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG720540135 or 720540135. Listed at 22 retailers as of October 29, 2026, with a 543% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
E
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG720540135
Dimensions6.91 × 6.95 × 4.15 mm
L/W Ratio1.01
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
6.91 mm6.95 mm1.21 ctE / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG720540135
Side View
Table 56.0%Crown 33.2°Girdle: MediumPavilion 40.1°Culet: NoneDepth 59.9%

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 29
Current: €322 EUR|Low: €148 EUR|High: €1,014 EUR|Avg: €425 EUR|-11.1%
Retailer 1
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Retailer 21
October 30, 2026
Retailer 20€155 EUR
Retailer 4€173 EUR
Retailer 13€180 EUR
Retailer 5€192 EUR
Retailer 6€192 EUR
Retailer 21€219 EUR
Retailer 8€261 EUR
Retailer 1€322 EUR
Retailer 17€330 EUR
Retailer 12€342 EUR
Retailer 2€350 EUR
Retailer 16€358 EUR
Retailer 7€415 EUR
Retailer 18€454 EUR
Retailer 19€481 EUR
Retailer 10€617 EUR
Retailer 14€632 EUR
Retailer 11€633 EUR
Retailer 3€666 EUR
Retailer 15€903 EUR
Retailer 9€993 EUR

33 data points across 21 retailers

22 retailers€155 EUR to €993 EUR

A
Cheapest Retailer
-
€155 EUR
$172 USD
A
Retailer 2
-
€173 EUR
$192 USD
View
Final sale: no returns
A
Retailer 3
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€180 EUR
$200 USD
View
A
Retailer 4
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€192 EUR
$214 USD
View
A
Retailer 5
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€192 EUR
$214 USD
View
A
Retailer 6
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€219 EUR
HK$1,900 HKD
View
B+
Retailer 7
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€261 EUR
$290 USD
View
A
Retailer 8
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€322 EUR
£282 GBP
View
A
Retailer 9
-
€330 EUR
ZAR 5,928 ZAR
View
A
Retailer 10
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€342 EUR
£300 GBP
View
A
Retailer 11
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€350 EUR
$390 USD
View
A
Retailer 12
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€358 EUR
View
B+
Retailer 13
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€415 EUR
$462 USD
View
Retailer 14
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€454 EUR
$505 USD
View
Price last confirmed 12 days ago
B+
Retailer 15
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€481 EUR
$535 USD
View
B+
Retailer 16
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€617 EUR
$687 USD
View
B
Retailer 17
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€632 EUR
SGD 951 SGD
View
B
Retailer 18
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€633 EUR
$705 USD
View
B
Retailer 19
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€666 EUR
$742 USD
View
B
Retailer 20
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€903 EUR
£791 GBP
View
B
Retailer 21
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€993 EUR
$1,105 USD
View
Most Expensive
Queensmith
LG720540135 · Oct 27
€1,871 EUR
£1,640 GBP
View
Price under review
21 more retailers have this diamond
Prices start from €155 EURSave up to €839 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
€155 EUR