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Round|Lab Grown|GIA

4.20ct D IF Round Lab Grown Diamond

EX • D/IF • GIA 6512462588

Certificate GIA 6512462588

Diamond specifications and retailer prices

From £3,927 GBP
$5,230 USD
As of October 29, 2026
Save £19,738 GBP (83%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £27,018 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 6512462588. Listed at 18 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 angle35°
Pavilion angle40.8°
OriginLab Grown
Grading LabGIA
CertificateGIA 6512462588
Dimensions10.31 × 10.33 × 6.39 mm
L/W Ratio1.00
Star length50%
Lower girdle75%
Top View
10.31 mm10.33 mm4.20 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6512462588
Side View
Table 57.0%Crown 35°Girdle: MED-STKPavilion 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: Oct 29
Current: £27,018 GBP|Low: £4,116 GBP|High: £27,161 GBP|Avg: £12,402 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 12£4,116 GBP
Retailer 3£4,141 GBP
Retailer 9£4,566 GBP
Retailer 13£6,584 GBP
Retailer 7£7,906 GBP
Retailer 6£10,287 GBP
Retailer 8£11,119 GBP
Retailer 11£11,298 GBP
Retailer 2£11,578 GBP
Retailer 5£17,657 GBP
Retailer 10£17,707 GBP
Retailer 4£23,666 GBP
Do Amore Diamonds£27,018 GBP

27 data points across 13 retailers

18 retailers£3,927 GBP to £23,666 GBP

A
Cheapest Retailer
-
£3,927 GBP
$5,230 USD
A
Retailer 2
-
£4,116 GBP
$5,481 USD
View
A
Retailer 3
-
£4,141 GBP
$5,514 USD
View
A
Retailer 4
-
£4,556 GBP
$6,067 USD
View
Retailer 5
-
£4,556 GBP
$6,067 USD
View
Price last confirmed 13 days ago
A
Retailer 6
-
£4,566 GBP
$6,080 USD
View
B+
Retailer 7
-
£5,970 GBP
$7,950 USD
View
B+
Retailer 8
-
£6,584 GBP
$8,768 USD
View
B+
Retailer 9
-
£7,906 GBP
€10,027 EUR
View
B+
Retailer 10
-
£10,287 GBP
View
Retailer 11
-
£11,119 GBP
A$22,779 AUD
View
Price last confirmed 7 days ago
B
Retailer 12
-
£11,298 GBP
$15,045 USD
View
B+
Retailer 13
-
£11,578 GBP
$15,418 USD
View
B
Retailer 14
-
£12,547 GBP
$16,709 USD
View
B
Retailer 15
-
£17,657 GBP
$23,513 USD
View
B
Retailer 16
-
£17,707 GBP
$23,580 USD
View
B
Retailer 17
-
£23,666 GBP
$31,515 USD
View
Most Expensive
Do Amore Diamonds
27-30833C752 · Oct 29
£27,018 GBP
$35,980 USD
View
Price under review
17 more retailers have this diamond
Prices start from £3,927 GBPSave up to £19,738 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
£3,927 GBP