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Round|Lab Grown|IGI

4.20ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG754594373

Shape and cutting style on the report: Round brilliant

Certificate IGI LG754594373

Diamond specifications and retailer prices

From €1,708 EUR
$1,908 USD
As of November 1, 2026
Save €10,116 EUR (86%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: €11,824 EUR at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 4.2ct lab-grown round diamond

This 4.2ct lab-grown round sits in the three to five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG754594373 or 754594373. Listed at 17 retailers as of October 31, 2026, with prices from €1,708 to €11,824, a €10,116 spread on the same certified stone. Brilliant Earth lists it at €11,824. 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
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754594373
Dimensions10.35 × 10.39 × 6.37 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
10.35 mm10.39 mm4.20 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754594373
Side View
Table 56.0%Crown 34.3°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.4%

Caratlytics Score

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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: €11,824 EUR|Low: €1,677 EUR|High: €21,751 EUR|Avg: €5,202 EUR|-45.6%
Brilliant Earth
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
Retailer 15
Retailer 16
Retailer 17
November 1, 2026
Retailer 16€1,708 EUR
Retailer 6€1,858 EUR
Retailer 17€2,069 EUR
Retailer 9€2,148 EUR
Retailer 14€2,569 EUR
Retailer 5€3,006 EUR
Retailer 15€3,102 EUR
Retailer 4€3,253 EUR
Retailer 8€3,286 EUR
Retailer 12€3,521 EUR
Retailer 7€4,565 EUR
Retailer 10€4,684 EUR
Retailer 13€5,478 EUR
Retailer 2€5,933 EUR
Retailer 11€9,561 EUR
Retailer 3€11,753 EUR
Brilliant Earth€11,824 EUR

38 data points across 17 retailers

17 retailers€1,708 EUR to €11,824 EUR

A
Cheapest Retailer
-
€1,708 EUR
$1,908 USD
A
Retailer 2
-
€1,858 EUR
$2,076 USD
View
A
Retailer 3
-
€2,069 EUR
$2,311 USD
View
A
Retailer 4
-
€2,148 EUR
$2,400 USD
View
Final sale: no returns
A
Retailer 5
-
€2,569 EUR
$2,870 USD
View
A
Retailer 6
-
€3,006 EUR
$3,358 USD
View
A
Retailer 7
-
€3,102 EUR
$3,466 USD
View
A
Retailer 8
-
€3,253 EUR
$3,634 USD
View
A
Retailer 9
-
€3,286 EUR
$3,671 USD
View
A
Retailer 10
-
€3,521 EUR
View
A
Retailer 11
-
€4,565 EUR
$5,100 USD
View
A
Retailer 12
-
€4,684 EUR
A$8,051 AUD
View
A
Retailer 13
-
€5,478 EUR
$6,120 USD
View
B+
Retailer 14
-
€5,933 EUR
£5,219 GBP
View
B+
Retailer 15
-
€9,561 EUR
A$16,434 AUD
View
B
Retailer 16
-
€11,753 EUR
$13,130 USD
View
Most Expensive
B
Brilliant Earth
17680491Y · Oct 31
€11,824 EUR
$13,210 USD
View
16 more retailers have this diamond
Prices start from €1,708 EURSave up to €10,116 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
€1,708 EUR