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Round|Lab Grown|GIA

4.20ct D IF Round Lab Grown Diamond

EX • D/IF • GIA 2527827765

Certificate GIA 2527827765

Diamond specifications and retailer prices

From £3,903 GBP
$5,230 USD
As of October 29, 2026
Save £19,617 GBP (83%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £26,853 GBP at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

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 GIA 2527827765. Listed at 19 retailers as of October 29, 2026, with a 503% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.8°
OriginLab Grown
Grading LabGIA
CertificateGIA 2527827765
Dimensions10.34 × 10.36 × 6.39 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
10.34 mm10.36 mm4.20 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2527827765
Side View
Table 56.0%Crown 34.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.8%

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: £26,853 GBP|Low: £4,115 GBP|High: £26,995 GBP|Avg: £12,329 GBP|-0.5%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 30, 2026
Retailer 13£4,115 GBP
Retailer 9£4,538 GBP
Retailer 5£4,636 GBP
Retailer 7£4,647 GBP
Retailer 12£6,544 GBP
Retailer 8£7,858 GBP
Retailer 6£10,224 GBP
Retailer 11£11,229 GBP
Retailer 2£11,507 GBP
Retailer 4£17,548 GBP
Retailer 10£17,598 GBP
Retailer 3£23,521 GBP
Do Amore Diamonds£26,853 GBP

26 data points across 13 retailers

19 retailers£3,903 GBP to £23,521 GBP

A
Cheapest Retailer
-
£3,903 GBP
$5,230 USD
A
Retailer 2
-
£4,091 GBP
$5,481 USD
View
A
Retailer 3
-
£4,115 GBP
$5,514 USD
View
A
Retailer 4
-
£4,182 GBP
$5,603 USD
View
Retailer 5
-
£4,528 GBP
$6,067 USD
View
Price last confirmed 14 days ago
A
Retailer 6
-
£4,528 GBP
$6,067 USD
View
A
Retailer 7
-
£4,538 GBP
$6,080 USD
View
B+
Retailer 8
-
£5,933 GBP
$7,950 USD
View
Retailer 9
-
£5,997 GBP
$8,035 USD
View
Price last confirmed 9 days ago
B+
Retailer 10
-
£6,544 GBP
$8,768 USD
View
B+
Retailer 11
-
£7,858 GBP
€10,027 EUR
View
B+
Retailer 12
-
£10,224 GBP
View
B
Retailer 13
-
£11,229 GBP
$15,045 USD
View
B+
Retailer 14
-
£11,507 GBP
$15,418 USD
View
B
Retailer 15
-
£12,470 GBP
$16,709 USD
View
B
Retailer 16
-
£17,548 GBP
$23,513 USD
View
B
Retailer 17
-
£17,598 GBP
$23,580 USD
View
B
Retailer 18
-
£23,521 GBP
$31,515 USD
View
Most Expensive
Do Amore Diamonds
27-406375325 · Oct 29
£26,853 GBP
$35,980 USD
View
Price under review
18 more retailers have this diamond
Prices start from £3,903 GBPSave up to £19,617 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
4.20ct Round
£3,903 GBP