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Radiant|Lab Grown|IGI

1.58ct D IF Radiant Lab Grown Diamond

EX • D/IF • IGI LG754508817

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

Certificate IGI LG754508817

Diamond specifications and retailer prices

From $303 USD
As of October 30, 2026
Save $2,657 USD (90%) vs most expensive(unlock to see where)
33 retailers carry this diamond
Most expensive: $2,960 USD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.58ct lab-grown radiant diamond

This 1.58ct lab-grown radiant sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG754508817 or 754508817. Listed at 33 retailers as of October 30, 2026, with prices from $303 to $2,960, a $2,657 spread on the same certified stone. Brilliant Earth lists it at $2,960. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.58
Carat
D
Color
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.6°
Pavilion angle35.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754508817
Dimensions5.89 × 5.89 × 3.95 mm
L/W Ratio1.00
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
5.89 mm5.89 mm1.58 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754508817
Side View
Table 62.0%Crown 42.6°Girdle: MediumPavilion 35.3°Culet: NoneDepth 67.1%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: $2,960 USD|Low: $303 USD|High: $3,410 USD|Avg: $1,177 USD|-13.2%
Brilliant Earth
Retailer 2
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Retailer 25
November 1, 2026
Retailer 8$303 USD
Retailer 11$363 USD
Retailer 18$373 USD
Retailer 3$440 USD
Retailer 24$535 USD
Retailer 23$550 USD
Retailer 9$582 USD
Retailer 12$637 USD
Retailer 13$671 USD
Retailer 22$712 USD
Retailer 2$742 USD
Retailer 10$857 USD
Retailer 14$939 USD
Retailer 21$965 USD
Retailer 4$1,153 USD
Retailer 17$1,416 USD
Retailer 5$1,442 USD
Retailer 15$1,492 USD
Retailer 7$1,517 USD
Retailer 16$1,587 USD
Retailer 20$1,669 USD
Retailer 19$1,702 USD
Retailer 25$2,460 USD
Retailer 6$2,690 USD
Brilliant Earth$2,960 USD

36 data points across 25 retailers

33 retailers$303 USD to $2,960 USD

A
Cheapest Retailer
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$303 USD
Retailer 2
-
$303 USD
View
Price last confirmed 24 days ago
Retailer 3
-
$322 USD
View
Price last confirmed 32 days ago
A
Retailer 4
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$363 USD
View
Final sale: no returns
Retailer 5
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$373 USD
View
Price last confirmed 35 days ago
Retailer 6
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$375 USD
View
Price last confirmed 29 days ago
Retailer 7
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$394 USD
View
Price last confirmed 33 days ago
Retailer 8
-
$440 USD
£347 GBP
View
Price last confirmed 15 days ago
A
Retailer 9
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$535 USD
View
A
Retailer 10
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$550 USD
HK$4,300 HKD
View
A
Retailer 11
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$582 USD
View
A
Retailer 12
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$637 USD
View
A
Retailer 13
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$671 USD
€639 EUR
View
A
Retailer 14
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$712 USD
ZAR 11,499 ZAR
View
Retailer 15
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$733 USD
£577 GBP
View
Price last confirmed 17 days ago
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Retailer 16
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$742 USD
£584 GBP
View
A
Retailer 17
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$857 USD
View
A
Retailer 18
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$939 USD
View
A
Retailer 19
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$965 USD
A$1,485 AUD
View
B+
Retailer 20
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$1,153 USD
View
Retailer 21
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$1,332 USD
View
Price last confirmed 22 days ago
B+
Retailer 22
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$1,332 USD
View
Retailer 23
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$1,416 USD
View
Price last confirmed 32 days ago
B+
Retailer 24
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$1,442 USD
View
B+
Retailer 25
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$1,492 USD
View
B+
Retailer 26
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$1,517 USD
View
B+
Retailer 27
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$1,587 USD
SGD 2,145 SGD
View
B+
Retailer 28
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$1,669 USD
£1,314 GBP
View
B+
Retailer 29
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$1,702 USD
A$2,618 AUD
View
B
Retailer 30
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$2,460 USD
View
B
Retailer 31
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$2,690 USD
View
B
Retailer 32
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$2,745 USD
View
Most Expensive
B
Brilliant Earth
18669310Y · Oct 31
$2,960 USD
View
32 more retailers have this diamond
Prices start from $303 USDSave up to $2,657 USD

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
1.58ct Radiant
$303 USD