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Heart|Lab Grown|IGI

4.51ct E FL Heart Lab Grown Diamond

ID • E/FL • IGI LG794623406

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG794623406

Diamond specifications and retailer prices

From $7,945 NZD
$4,478 USD
As of October 30, 2026
Save $46,721 NZD (85%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $54,666 NZD at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

About this 4.51ct lab-grown heart diamond

This 4.51ct lab-grown heart sits in the three to five carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG794623406 or 794623406. Listed at 9 retailers as of October 29, 2026, with prices from $7,945 to $54,666, a $46,721 spread on the same certified stone. Do Amore Diamonds lists it at $54,666. 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
E
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle37.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG794623406
Dimensions11.84 × 9.95 × 6.57 mm
L/W Ratio1.19
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
11.84 mm9.95 mm4.51 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG794623406
Side View
Table 59.0%Crown 35.3°Girdle: STK-THKPavilion 37.3°Culet: NoneDepth 55.5%

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 30
Current: $54,666 NZD|Low: $7,945 NZD|High: $70,741 NZD|Avg: $28,717 NZD|-22.7%
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$7,945 NZD
Retailer 10$8,327 NZD
Retailer 9$11,882 NZD
Retailer 7$11,888 NZD
Retailer 8$12,078 NZD
Retailer 11$14,257 NZD
Retailer 6$20,812 NZD
Retailer 4$23,513 NZD
Retailer 2$25,745 NZD
Retailer 13$29,666 NZD
Retailer 3$41,454 NZD
Do Amore Diamonds$54,666 NZD
Retailer 5$69,163 NZD

21 data points across 13 retailers

9 retailers$7,945 NZD to $54,666 NZD

A
Cheapest Retailer
-
$7,945 NZD
$4,478 USD
A
Retailer 2
-
$8,327 NZD
$4,693 USD
View
A
Retailer 3
-
$11,882 NZD
$6,697 USD
View
A
Retailer 4
-
$11,888 NZD
$6,700 USD
View
A
Retailer 5
-
$12,078 NZD
$6,807 USD
View
A
Retailer 6
-
$14,257 NZD
$8,035 USD
View
B+
Retailer 7
-
$20,812 NZD
£9,236 GBP
View
B+
Retailer 8
-
$25,745 NZD
$14,510 USD
View
Most Expensive
B
Do Amore Diamonds
27-84D286800 · Oct 29
$54,666 NZD
$30,810 USD
View
8 more retailers have this diamond
Prices start from $7,945 NZDSave up to $46,721 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 Heart
$7,945 NZD