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Radiant|Lab Grown|IGI

5.10ct E FL Radiant Lab Grown Diamond

ID • E/FL • IGI LG821639486

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG821639486

Diamond specifications and retailer prices

From $16,405 NZD
$9,246 USD
As of October 30, 2026
Save $42,545 NZD (72%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $58,950 NZD at Taylor and Hart · As of October 30, 2026
View at Taylor and Hart

About this 5.1ct lab-grown radiant diamond

This 5.1ct lab-grown radiant sits in the over five carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG821639486 or 821639486. Listed at 14 retailers as of October 30, 2026, with prices from $16,405 to $58,950, a $42,545 spread on the same certified stone. Taylor and Hart lists it at $58,950. 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

5.10
Carat
E
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.5°
Pavilion angle34.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG821639486
Dimensions12.21 × 8.59 × 5.68 mm
L/W Ratio1.42
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
12.21 mm8.59 mm5.10 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG821639486
Side View
Table 63.0%Crown 43.5°Girdle: MED-STKPavilion 34.4°Culet: NoneDepth 66.1%

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 30
Current: $30,589 NZD|Low: $16,405 NZD|High: $126,774 NZD|Avg: $39,163 NZD|-16.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Taylor and Hart
October 30, 2026
Retailer 11$16,405 NZD
Retailer 13$18,547 NZD
Retailer 2$19,695 NZD
Retailer 3$20,463 NZD
Retailer 10$20,821 NZD
Retailer 6$22,643 NZD
Retailer 1$30,589 NZD
Retailer 9$31,401 NZD
Retailer 8$33,625 NZD
Retailer 5$34,274 NZD
Retailer 7$38,070 NZD
Retailer 12$51,760 NZD
Taylor and Hart$58,950 NZD
Retailer 4$101,919 NZD

37 data points across 14 retailers

14 retailers$16,405 NZD to $58,950 NZD

A
Cheapest Retailer
-
$16,405 NZD
$9,246 USD
A
Retailer 2
-
$18,547 NZD
$10,453 USD
View
A
Retailer 3
-
$19,695 NZD
$11,100 USD
View
A
Retailer 4
-
$20,463 NZD
HK$90,100 HKD
View
Retailer 5
-
$20,821 NZD
$11,735 USD
View
Price last confirmed 12 days ago
A
Retailer 6
-
$22,643 NZD
£10,049 GBP
View
A
Retailer 7
-
$30,589 NZD
$17,240 USD
View
Retailer 8
-
$31,401 NZD
€16,855 EUR
View
Price last confirmed 7 days ago
A
Retailer 9
-
$33,625 NZD
£14,922 GBP
View
B+
Retailer 10
-
$34,274 NZD
$19,317 USD
View
B+
Retailer 11
-
$38,070 NZD
ZAR 346,633 ZAR
View
B+
Retailer 12
-
$51,760 NZD
$29,172 USD
View
Most Expensive
B+
Taylor and Hart
2R16V7D · Oct 30
$58,950 NZD
$33,224 USD
View
12 more retailers have this diamond
Prices start from $16,405 NZDSave up to $42,545 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
5.10ct Radiant
$16,405 NZD