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Round|Lab Grown|GIA

4.20ct D IF Round Lab Grown Diamond

EX • D/IF • GIA 3515707720

Certificate GIA 3515707720

Diamond specifications and retailer prices

From $8,417 NZD
$4,744 USD
As of October 29, 2026
Save $49,496 NZD (85%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $57,913 NZD 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 3515707720. Listed at 15 retailers as of October 29, 2026, with prices from $8,417 to $57,913, a $49,496 spread on the same certified stone. Do Amore Diamonds lists it at $57,913. 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°
Pavilion angle40.8°
OriginLab Grown
Grading LabGIA
CertificateGIA 3515707720
Dimensions10.38 × 10.41 × 6.35 mm
L/W Ratio1.00
Top View
10.38 mm10.41 mm4.20 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3515707720
Side View
Table 57.0%Crown 34°Girdle: Slightly ThickPavilion 40.8°Culet: NoneDepth 61.1%

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: $57,913 NZD|Low: $8,229 NZD|High: $59,226 NZD|Avg: $19,690 NZD|-1.8%
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
November 1, 2026
Retailer 15$8,417 NZD
Retailer 10$8,822 NZD
Retailer 12$9,558 NZD
Retailer 14$10,692 NZD
Retailer 4$10,947 NZD
Retailer 11$12,392 NZD
Retailer 9$12,796 NZD
Retailer 2$15,101 NZD
Retailer 7$16,022 NZD
Retailer 8$18,626 NZD
Retailer 13$20,523 NZD
Retailer 3$22,362 NZD
Retailer 6$24,920 NZD
Retailer 5$41,838 NZD
Do Amore Diamonds$57,913 NZD

35 data points across 15 retailers

15 retailers$8,417 NZD to $57,913 NZD

A
Cheapest Retailer
-
$8,417 NZD
$4,744 USD
A
Retailer 2
-
$8,822 NZD
$4,972 USD
View
A
Retailer 3
-
$9,558 NZD
$5,387 USD
View
A
Retailer 4
-
$10,692 NZD
$6,026 USD
View
Final sale: no returns
A
Retailer 5
-
$10,947 NZD
$6,170 USD
View
B+
Retailer 6
-
$12,392 NZD
$6,984 USD
View
B+
Retailer 7
-
$12,796 NZD
$7,212 USD
View
B+
Retailer 8
-
$15,101 NZD
$8,511 USD
View
B+
Retailer 9
-
$16,022 NZD
$9,030 USD
View
B+
Retailer 10
-
$18,626 NZD
€9,998 EUR
View
B+
Retailer 11
-
$20,523 NZD
$11,567 USD
View
B+
Retailer 12
-
$22,362 NZD
£9,924 GBP
View
B+
Retailer 13
-
$24,920 NZD
$14,045 USD
View
B
Retailer 14
-
$41,838 NZD
$23,580 USD
View
Most Expensive
B
Do Amore Diamonds
27-583E6BE5B · Oct 31
$57,913 NZD
$32,640 USD
View
14 more retailers have this diamond
Prices start from $8,417 NZDSave up to $49,496 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
$8,417 NZD