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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 $9,280 NZD
$5,230 USD
As of October 29, 2026
Save $46,637 NZD (83%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $63,839 NZD 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: $63,839 NZD|Low: $8,909 NZD|High: $64,176 NZD|Avg: $25,919 NZD|-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
October 30, 2026
Retailer 14$9,280 NZD
Retailer 4$9,725 NZD
Retailer 6$9,783 NZD
Retailer 16$10,765 NZD
Retailer 12$10,788 NZD
Retailer 3$14,106 NZD
Retailer 5$15,557 NZD
Retailer 10$18,680 NZD
Retailer 9$24,307 NZD
Retailer 11$26,271 NZD
Retailer 15$26,694 NZD
Retailer 2$27,356 NZD
Retailer 8$41,719 NZD
Retailer 13$41,838 NZD
Retailer 7$55,917 NZD
Do Amore Diamonds$63,839 NZD

29 data points across 16 retailers

18 retailers$9,280 NZD to $55,917 NZD

A
Cheapest Retailer
-
$9,280 NZD
$5,230 USD
A
Retailer 2
-
$9,725 NZD
$5,481 USD
View
A
Retailer 3
-
$9,783 NZD
$5,514 USD
View
A
Retailer 4
-
$10,765 NZD
$6,067 USD
View
Retailer 5
-
$10,765 NZD
$6,067 USD
View
Price last confirmed 15 days ago
A
Retailer 6
-
$10,788 NZD
$6,080 USD
View
B+
Retailer 7
-
$14,106 NZD
$7,950 USD
View
B+
Retailer 8
-
$15,557 NZD
$8,768 USD
View
B+
Retailer 9
-
$18,680 NZD
€10,027 EUR
View
B+
Retailer 10
-
$24,307 NZD
£10,787 GBP
View
Retailer 11
-
$26,271 NZD
A$22,779 AUD
View
Price last confirmed 9 days ago
B
Retailer 12
-
$26,694 NZD
$15,045 USD
View
B+
Retailer 13
-
$27,356 NZD
$15,418 USD
View
B
Retailer 14
-
$29,647 NZD
$16,709 USD
View
B
Retailer 15
-
$41,719 NZD
$23,513 USD
View
B
Retailer 16
-
$41,838 NZD
$23,580 USD
View
B
Retailer 17
-
$55,917 NZD
$31,515 USD
View
Most Expensive
Do Amore Diamonds
27-30833C752 · Oct 29
$63,839 NZD
$35,980 USD
View
Price under review
17 more retailers have this diamond
Prices start from $9,280 NZDSave up to $46,637 NZD

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
$9,280 NZD