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Round|Lab Grown|IGI

4.20ct F IF Round Lab Grown Diamond

ID • F/IF • IGI LG579399216

Shape and cutting style on the report: Round brilliant

Certificate IGI LG579399216

Diamond specifications and retailer prices

From €2,706 EUR
$3,023 USD
As of November 1, 2026
Save €17,253 EUR (86%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: €19,959 EUR at Mervis Diamond Importers · As of October 31, 2026
View at Mervis Diamond Importers

About this 4.2ct lab-grown round diamond

This 4.2ct lab-grown round sits in the three to five carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG579399216 or 579399216. Listed at 23 retailers as of October 31, 2026, with prices from €2,706 to €19,959, a €17,253 spread on the same certified stone. Mervis Diamond Importers lists it at €19,959. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

4.20
Carat
F
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG579399216
Dimensions10.32 × 10.30 × 6.39 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
HEARTS & ARROWS 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
10.32 mm10.30 mm4.20 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG579399216
Side View
Table 58.0%Crown 35.4°Girdle: MediumPavilion 40.8°Culet: NoneDepth 61.9%

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: Nov 1
Current: €19,959 EUR|Low: €2,598 EUR|High: €19,959 EUR|Avg: €6,549 EUR
Mervis Diamond Importers
Retailer 2
Retailer 3
Retailer 4
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Retailer 8
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Retailer 11
Retailer 12
Retailer 13
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Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 1, 2026
Retailer 18€2,706 EUR
Retailer 9€2,944 EUR
Retailer 7€3,031 EUR
Retailer 3€3,139 EUR
Retailer 15€3,142 EUR
Retailer 8€3,223 EUR
Retailer 10€4,330 EUR
Retailer 17€4,418 EUR
Retailer 13€4,599 EUR
Retailer 5€4,879 EUR
Retailer 16€5,903 EUR
Retailer 14€7,374 EUR
Retailer 12€7,465 EUR
Retailer 4€7,929 EUR
Retailer 2€8,783 EUR
Retailer 19€9,237 EUR
Retailer 6€9,815 EUR
Retailer 11€10,000 EUR
Mervis Diamond Importers€19,959 EUR

42 data points across 19 retailers

23 retailers€2,706 EUR to €19,959 EUR

A
Cheapest Retailer
-
€2,706 EUR
$3,023 USD
A
Retailer 2
-
€2,944 EUR
$3,289 USD
View
A
Retailer 3
-
€3,031 EUR
$3,386 USD
View
Final sale: no returns
Retailer 4
-
€3,139 EUR
$3,507 USD
View
Price last confirmed 20 days ago
A
Retailer 5
-
€3,139 EUR
$3,507 USD
View
A
Retailer 6
-
€3,142 EUR
$3,510 USD
View
A
Retailer 7
-
€3,223 EUR
$3,601 USD
View
A
Retailer 8
-
€3,622 EUR
$4,046 USD
View
B+
Retailer 9
-
€4,330 EUR
$4,837 USD
View
B+
Retailer 10
-
€4,418 EUR
$4,936 USD
View
B+
Retailer 11
-
€4,599 EUR
£4,046 GBP
View
B+
Retailer 12
-
€4,879 EUR
$5,451 USD
View
Retailer 13
-
€5,903 EUR
$6,595 USD
View
Price last confirmed 11 days ago
B+
Retailer 14
-
€7,374 EUR
ZAR 133,087 ZAR
View
B+
Retailer 15
-
€7,465 EUR
A$12,830 AUD
View
B
Retailer 16
-
€7,929 EUR
$8,858 USD
View
B+
Retailer 17
-
€8,783 EUR
£7,726 GBP
View
B
Retailer 18
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€9,237 EUR
$10,320 USD
View
B
Retailer 19
-
€9,815 EUR
$10,965 USD
View
B
Retailer 20
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€10,000 EUR
$11,172 USD
View
B
Retailer 21
-
€12,150 EUR
$13,574 USD
View
B
Retailer 22
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€18,618 EUR
$20,800 USD
View
Most Expensive
B
Mervis Diamond Importers
1985409114 · Oct 31
€19,959 EUR
$22,298 USD
View
22 more retailers have this diamond
Prices start from €2,706 EURSave up to €17,253 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
4.20ct Round
€2,706 EUR