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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 $172 USD
As of October 29, 2026
Save $933 USD (84%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $2,083 USD 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
Color
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: $358 USD|Low: $165 USD|High: $1,129 USD|Avg: $473 USD|-11.1%
Retailer 1
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Retailer 21
October 30, 2026
Retailer 20$172 USD
Retailer 4$192 USD
Retailer 13$200 USD
Retailer 5$214 USD
Retailer 6$214 USD
Retailer 21$243 USD
Retailer 8$290 USD
Retailer 1$358 USD
Retailer 17$367 USD
Retailer 12$381 USD
Retailer 2$390 USD
Retailer 16$399 USD
Retailer 7$462 USD
Retailer 18$505 USD
Retailer 19$535 USD
Retailer 10$687 USD
Retailer 14$704 USD
Retailer 11$705 USD
Retailer 3$742 USD
Retailer 15$1,005 USD
Retailer 9$1,105 USD

33 data points across 21 retailers

22 retailers$172 USD to $1,105 USD

A
Cheapest Retailer
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$172 USD
A
Retailer 2
-
$192 USD
View
Final sale: no returns
A
Retailer 3
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$200 USD
View
A
Retailer 4
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$214 USD
View
A
Retailer 5
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$214 USD
View
A
Retailer 6
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$243 USD
HK$1,900 HKD
View
B+
Retailer 7
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$290 USD
View
A
Retailer 8
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$358 USD
£282 GBP
View
A
Retailer 9
-
$367 USD
ZAR 5,928 ZAR
View
A
Retailer 10
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$381 USD
£300 GBP
View
A
Retailer 11
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$390 USD
View
A
Retailer 12
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$399 USD
€380 EUR
View
B+
Retailer 13
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$462 USD
View
Retailer 14
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$505 USD
View
Price last confirmed 12 days ago
B+
Retailer 15
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$535 USD
View
B+
Retailer 16
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$687 USD
View
B
Retailer 17
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$704 USD
SGD 951 SGD
View
B
Retailer 18
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$705 USD
View
B
Retailer 19
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$742 USD
View
B
Retailer 20
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$1,005 USD
£791 GBP
View
B
Retailer 21
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$1,105 USD
View
Most Expensive
Queensmith
LG720540135 · Oct 27
$2,083 USD
£1,640 GBP
View
Price under review
21 more retailers have this diamond
Prices start from $172 USDSave up to $933 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.

A
1.21ct Round
$172 USD