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Round|Lab Grown|IGI

5.21ct D FL Round Lab Grown Diamond

ID • D/FL • IGI LG790611705

Shape and cutting style on the report: Round brilliant

Certificate IGI LG790611705

Diamond specifications and retailer prices

From £4,568 GBP
$6,121 USD
As of October 29, 2026
Save £13,885 GBP (75%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £18,453 GBP at Michael Trio · As of October 31, 2026
View at Michael Trio

About this 5.21ct lab-grown round diamond

This 5.21ct lab-grown round sits in the over five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG790611705 or 790611705. Listed at 23 retailers as of October 29, 2026, with prices from £4,568 to £18,453, a £13,885 spread on the same certified stone. Michael Trio lists it at £18,453. 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

5.21
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG790611705
Dimensions11.03 × 11.10 × 6.84 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
HEARTS & ARROWS 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
11.03 mm11.10 mm5.21 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG790611705
Side View
Table 58.0%Crown 35°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £18,453 GBP|Low: £4,568 GBP|High: £25,636 GBP|Avg: £9,502 GBP|-10.1%
Michael Trio
Retailer 2
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Retailer 22
November 1, 2026
Retailer 7£4,568 GBP
Retailer 15£4,787 GBP
Retailer 9£4,846 GBP
Retailer 11£5,115 GBP
Retailer 16£5,288 GBP
Retailer 6£5,299 GBP
Retailer 12£5,299 GBP
Retailer 14£6,290 GBP
Retailer 21£6,301 GBP
Retailer 22£6,372 GBP
Retailer 20£6,605 GBP
Retailer 2£6,613 GBP
Retailer 8£7,698 GBP
Retailer 3£8,176 GBP
Retailer 13£8,731 GBP
Retailer 5£9,943 GBP
Retailer 18£10,765 GBP
Retailer 19£10,840 GBP
Retailer 4£14,743 GBP
Retailer 17£15,001 GBP
Retailer 10£18,434 GBP
Michael Trio£18,453 GBP

41 data points across 22 retailers

23 retailers£4,568 GBP to £18,453 GBP

A
Cheapest Retailer
-
£4,568 GBP
$6,121 USD
A
Retailer 2
-
£4,787 GBP
$6,414 USD
View
A
Retailer 3
-
£4,846 GBP
$6,493 USD
View
A
Retailer 4
-
£5,115 GBP
$6,854 USD
View
Final sale: no returns
A
Retailer 5
-
£5,288 GBP
$7,085 USD
View
A
Retailer 6
-
£5,299 GBP
$7,100 USD
View
Retailer 7
-
£5,299 GBP
$7,100 USD
View
Price last confirmed 15 days ago
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Retailer 8
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£6,290 GBP
$8,428 USD
View
A
Retailer 9
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£6,301 GBP
$8,442 USD
View
A
Retailer 10
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£6,372 GBP
HK$66,700 HKD
View
Retailer 11
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£6,605 GBP
$8,850 USD
View
Price last confirmed 14 days ago
A
Retailer 12
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£6,613 GBP
View
A
Retailer 13
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£7,698 GBP
$10,315 USD
View
A
Retailer 14
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£8,176 GBP
$10,955 USD
View
A
Retailer 15
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£8,731 GBP
€11,141 EUR
View
A
Retailer 16
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£9,522 GBP
$12,759 USD
View
A
Retailer 17
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£9,943 GBP
$13,323 USD
View
A
Retailer 18
-
£10,765 GBP
ZAR 233,030 ZAR
View
A
Retailer 19
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£10,840 GBP
View
B+
Retailer 20
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£14,743 GBP
$19,754 USD
View
B+
Retailer 21
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£15,001 GBP
$20,100 USD
View
B
Retailer 22
-
£18,434 GBP
$24,699 USD
View
Most Expensive
B
Michael Trio
8155789340 · Oct 31
£18,453 GBP
SGD 33,412 SGD
View
22 more retailers have this diamond
Prices start from £4,568 GBPSave up to £13,885 GBP

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
5.21ct Round
£4,568 GBP