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Round|Lab Grown|GIA

4.51ct D IF Round Lab Grown Diamond

EX • D/IF • GIA 6515404393

Certificate GIA 6515404393

Diamond specifications and retailer prices

From $11,982 NZD
$6,753 USD
As of October 29, 2026
Save $35,605 NZD (75%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $74,769 NZD at Do Amore Diamonds · As of October 30, 2026
View at Do Amore Diamonds

About this 4.51ct lab-grown round diamond

This 4.51ct 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 6515404393. Listed at 17 retailers as of October 29, 2026, with a 297% 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

4.51
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.8°
OriginLab Grown
Grading LabGIA
CertificateGIA 6515404393
Dimensions10.57 × 10.50 × 6.55 mm
L/W Ratio1.01
Top View
10.57 mm10.50 mm4.51 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6515404393
Side View
Table 56.0%Crown 35°Girdle: ThickPavilion 40.8°Culet: NoneDepth 62.1%

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: $74,769 NZD|Low: $11,744 NZD|High: $76,330 NZD|Avg: $24,857 NZD|-2.0%
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
Retailer 17
October 31, 2026
Retailer 14$11,982 NZD
Retailer 15$12,250 NZD
Retailer 4$12,461 NZD
Retailer 8$12,977 NZD
Retailer 17$13,840 NZD
Retailer 11$14,393 NZD
Retailer 12$15,774 NZD
Retailer 16$15,976 NZD
Retailer 13$16,111 NZD
Retailer 3$17,255 NZD
Retailer 7$17,725 NZD
Retailer 2$26,082 NZD
Retailer 10$30,285 NZD
Retailer 5$33,365 NZD
Retailer 9$33,743 NZD
Retailer 6$47,587 NZD
Do Amore Diamonds$74,769 NZD

33 data points across 17 retailers

17 retailers$11,982 NZD to $47,587 NZD

A
Cheapest Retailer
-
$11,982 NZD
$6,753 USD
A
Retailer 2
-
$12,250 NZD
$6,904 USD
View
A
Retailer 3
-
$12,461 NZD
$7,023 USD
View
B+
Retailer 4
-
$12,954 NZD
$7,301 USD
View
B+
Retailer 5
-
$12,977 NZD
$7,314 USD
View
B+
Retailer 6
-
$13,840 NZD
$7,800 USD
View
B+
Retailer 7
-
$15,774 NZD
$8,890 USD
View
B+
Retailer 8
-
$15,976 NZD
$9,004 USD
View
B+
Retailer 9
-
$16,111 NZD
$9,080 USD
View
B+
Retailer 10
-
$17,255 NZD
$9,725 USD
View
B+
Retailer 11
-
$17,725 NZD
$9,990 USD
View
Final sale: no returns
B+
Retailer 12
-
$26,082 NZD
€14,000 EUR
View
B+
Retailer 13
-
$30,285 NZD
£13,440 GBP
View
B
Retailer 14
-
$32,855 NZD
$18,517 USD
View
Retailer 15
-
$33,365 NZD
A$28,930 AUD
View
Price last confirmed 23 days ago
B
Retailer 16
-
$47,587 NZD
$26,820 USD
View
Most Expensive
Do Amore Diamonds
27-177AE55DD · Oct 30
$74,769 NZD
$42,140 USD
View
Price under review
16 more retailers have this diamond
Prices start from $11,982 NZDSave up to $35,605 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
4.51ct Round
$11,982 NZD