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Round|Lab Grown|IGI

3.21ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG626401447

Shape and cutting style on the report: Round brilliant

Certificate IGI LG626401447

Diamond specifications and retailer prices

From £242 GBP
$324 USD
As of October 26, 2026
Save £1,908 GBP (89%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £2,149 GBP at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

About this 3.21ct lab-grown round diamond

This 3.21ct lab-grown round sits in the three to five carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG626401447 or 626401447. Listed at 11 retailers as of October 26, 2026, with prices from £242 to £2,149, a £1,908 spread on the same certified stone. Do Amore Diamonds lists it at £2,149. 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

3.21
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG626401447
Dimensions9.41 × 9.46 × 5.76 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
9.41 mm9.46 mm3.21 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG626401447
Side View
Table 59.0%Crown 34.4°Girdle: MediumPavilion 40.7°Culet: NoneDepth 61.1%

Caratlytics Score

How it works →
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: Oct 26
Current: £2,149 GBP|Low: £242 GBP|High: £2,261 GBP|Avg: £950 GBP|-5.0%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 29, 2026
Retailer 8£242 GBP
Retailer 6£281 GBP
Retailer 10£486 GBP
Retailer 4£489 GBP
Retailer 2£519 GBP
Retailer 11£805 GBP
Retailer 7£879 GBP
Retailer 9£1,064 GBP
Retailer 5£1,295 GBP
Retailer 3£1,590 GBP
Do Amore Diamonds£2,149 GBP

33 data points across 11 retailers

11 retailers£242 GBP to £2,149 GBP

A
Cheapest Retailer
-
£242 GBP
$324 USD
A
Retailer 2
-
£281 GBP
$376 USD
View
B+
Retailer 3
-
£486 GBP
$651 USD
View
B+
Retailer 4
-
£489 GBP
$655 USD
View
A
Retailer 5
-
£519 GBP
View
B+
Retailer 6
-
£805 GBP
$1,079 USD
View
B+
Retailer 7
-
£879 GBP
$1,178 USD
View
B+
Retailer 8
-
£1,064 GBP
$1,425 USD
View
B+
Retailer 9
-
£1,295 GBP
View
Price last confirmed 7 days ago
B
Retailer 10
-
£1,590 GBP
$2,130 USD
View
Most Expensive
B
Do Amore Diamonds
27-EBEE7FE81 · Oct 29
£2,149 GBP
$2,880 USD
View
10 more retailers have this diamond
Prices start from £242 GBPSave up to £1,908 GBP

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
3.21ct Round
£242 GBP