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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 $7,445 AUD
$5,230 USD
As of November 1, 2026
Save $37,419 AUD (83%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $51,221 AUD at Do Amore Diamonds · As of October 31, 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 31, 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: Nov 1
Current: $51,221 AUD|Low: $7,148 AUD|High: $51,492 AUD|Avg: $20,782 AUD|-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
Retailer 14
Retailer 15
Retailer 16
November 1, 2026
Retailer 14$7,445 AUD
Retailer 4$7,803 AUD
Retailer 6$7,850 AUD
Retailer 16$8,637 AUD
Retailer 12$8,655 AUD
Retailer 3$11,318 AUD
Retailer 5$12,482 AUD
Retailer 11$14,988 AUD
Retailer 10$19,503 AUD
Retailer 2$21,043 AUD
Retailer 15$21,418 AUD
Retailer 9$21,949 AUD
Retailer 8$33,473 AUD
Retailer 13$33,568 AUD
Retailer 7$44,865 AUD
Do Amore Diamonds$51,221 AUD

30 data points across 16 retailers

18 retailers$7,445 AUD to $44,865 AUD

A
Cheapest Retailer
-
$7,445 AUD
$5,230 USD
A
Retailer 2
-
$7,803 AUD
$5,481 USD
View
A
Retailer 3
-
$7,850 AUD
$5,514 USD
View
A
Retailer 4
-
$8,637 AUD
$6,067 USD
View
Retailer 5
-
$8,637 AUD
$6,067 USD
View
Price last confirmed 16 days ago
A
Retailer 6
-
$8,655 AUD
$6,080 USD
View
B+
Retailer 7
-
$11,318 AUD
$7,950 USD
View
B+
Retailer 8
-
$12,482 AUD
$8,768 USD
View
B+
Retailer 9
-
$14,988 AUD
€10,027 EUR
View
B+
Retailer 10
-
$19,503 AUD
£10,787 GBP
View
B+
Retailer 11
-
$21,043 AUD
View
B
Retailer 12
-
$21,418 AUD
$15,045 USD
View
B+
Retailer 13
-
$21,949 AUD
$15,418 USD
View
B
Retailer 14
-
$23,787 AUD
$16,709 USD
View
B
Retailer 15
-
$33,473 AUD
$23,513 USD
View
B
Retailer 16
-
$33,568 AUD
$23,580 USD
View
B
Retailer 17
-
$44,865 AUD
$31,515 USD
View
Most Expensive
Do Amore Diamonds
27-30833C752 · Oct 31
$51,221 AUD
$35,980 USD
View
Price under review
17 more retailers have this diamond
Prices start from $7,445 AUDSave up to $37,419 AUD

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
$7,445 AUD