Radiant|Lab Grown|IGI

1.55ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG689566199

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

Certificate IGI LG689566199

Diamond specifications and retailer prices

From $328 USD
As of October 30, 2026
Save $2,247 USD (87%) vs most expensive(unlock to see where)
29 retailers carry this diamond
Most expensive: $2,575 USD at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 1.55ct lab-grown radiant diamond

This 1.55ct 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 LG689566199 or 689566199. Listed at 29 retailers as of October 28, 2026, with prices from $328 to $2,575, a $2,247 spread on the same certified stone. Rare Carat lists it at $2,575. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.55
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.9°
Pavilion angle33.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG689566199
Dimensions8.31 × 5.87 × 3.80 mm
L/W Ratio1.42
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
8.31 mm5.87 mm1.55 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG689566199
Side View
Table 62.0%Crown 37.9°Girdle: MediumPavilion 33.2°Culet: NoneDepth 64.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: $2,575 USD|Low: $328 USD|High: $2,585 USD|Avg: $1,060 USD|-0.4%
Rare Carat
Retailer 2
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Retailer 5
Retailer 6
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Retailer 11
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Retailer 21
November 2, 2026
Retailer 3$328 USD
Retailer 17$367 USD
Retailer 10$474 USD
Retailer 16$515 USD
Retailer 4$572 USD
Retailer 15$659 USD
Retailer 8$665 USD
Retailer 2$702 USD
Retailer 13$728 USD
Retailer 9$921 USD
Retailer 19$949 USD
Retailer 5$1,067 USD
Retailer 20$1,194 USD
Retailer 11$1,353 USD
Retailer 14$1,360 USD
Retailer 12$1,361 USD
Retailer 7$1,537 USD
Retailer 6$1,603 USD
Retailer 18$1,640 USD
Retailer 21$1,687 USD
Rare Carat$2,575 USD

35 data points across 21 retailers

29 retailers$328 USD to $2,575 USD

A
Cheapest Retailer
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$328 USD
Retailer 2
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$328 USD
View
Price last confirmed 24 days ago
Retailer 3
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$349 USD
View
Price last confirmed 33 days ago
A
Retailer 4
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$367 USD
View
Final sale: no returns
Retailer 5
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$405 USD
View
Price last confirmed 35 days ago
Retailer 6
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$407 USD
View
Price last confirmed 29 days ago
Retailer 7
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$427 USD
View
Price last confirmed 34 days ago
A
Retailer 8
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$474 USD
HK$3,700 HKD
View
A
Retailer 9
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$515 USD
View
A
Retailer 10
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$572 USD
View
A
Retailer 11
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$659 USD
€628 EUR
View
A
Retailer 12
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$665 USD
View
A
Retailer 13
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$702 USD
ZAR 11,339 ZAR
View
A
Retailer 14
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$728 USD
£573 GBP
View
A
Retailer 15
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$921 USD
View
A
Retailer 16
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$949 USD
A$1,460 AUD
View
A
Retailer 17
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$1,067 USD
View
B+
Retailer 18
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$1,194 USD
View
Retailer 19
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$1,308 USD
View
Price last confirmed 22 days ago
B+
Retailer 20
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$1,308 USD
View
B+
Retailer 21
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$1,353 USD
View
B+
Retailer 22
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$1,360 USD
View
B+
Retailer 23
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$1,361 USD
SGD 1,839 SGD
View
Retailer 24
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$1,391 USD
View
Price last confirmed 32 days ago
B+
Retailer 25
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$1,537 USD
View
B+
Retailer 26
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$1,603 USD
View
B+
Retailer 27
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$1,640 USD
£1,291 GBP
View
Retailer 28
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$1,687 USD
A$2,596 AUD
View
Price last confirmed 24 days ago
Most Expensive
B
Rare Carat
1169-63-s · Oct 28
$2,575 USD
View
28 more retailers have this diamond
Prices start from $328 USDSave up to $2,247 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
1.55ct Radiant
$328 USD