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Round|Lab Grown|IGI

1.65ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • IGI LG764646676

Shape and cutting style on the report: Round brilliant

Certificate IGI LG764646676

Diamond specifications and retailer prices

From $238 USD
As of November 1, 2026
Save $1,492 USD (86%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,730 USD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.65ct lab-grown round diamond

This 1.65ct lab-grown round sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG764646676 or 764646676. Listed at 15 retailers as of October 31, 2026, with prices from $238 to $1,730, a $1,492 spread on the same certified stone. Brilliant Earth lists it at $1,730. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.65
Carat
D
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG764646676
Dimensions7.55 × 7.53 × 4.68 mm
L/W Ratio1.00
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
7.55 mm7.53 mm1.65 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG764646676
Side View
Table 58.0%Crown 33.3°Girdle: Slightly ThickPavilion 41.3°Culet: NoneDepth 62.1%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: $1,730 USD|Low: $228 USD|High: $1,780 USD|Avg: $622 USD|-2.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 1, 2026
Retailer 12$238 USD
Retailer 13$267 USD
Retailer 5$295 USD
Retailer 6$296 USD
Retailer 7$460 USD
Retailer 9$485 USD
Retailer 3$497 USD
Retailer 4$521 USD
Retailer 14$552 USD
Retailer 8$557 USD
Retailer 11$767 USD
Retailer 10$835 USD
Retailer 2$1,182 USD
Brilliant Earth$1,730 USD

34 data points across 14 retailers

15 retailers$238 USD to $1,730 USD

A
Cheapest Retailer
-
$238 USD
A
Retailer 2
-
$267 USD
View
Final sale: no returns
Retailer 3
-
$295 USD
View
Price last confirmed 7 days ago
Retailer 4
-
$296 USD
View
Price last confirmed 47 days ago
A
Retailer 5
-
$460 USD
£362 GBP
View
A
Retailer 6
-
$485 USD
€462 EUR
View
A
Retailer 7
-
$497 USD
View
A
Retailer 8
-
$521 USD
View
B+
Retailer 9
-
$552 USD
View
A
Retailer 10
-
$557 USD
£439 GBP
View
B+
Retailer 11
-
$767 USD
View
Retailer 12
-
$835 USD
View
Price last confirmed 7 days ago
Retailer 13
-
$881 USD
View
Price last confirmed 47 days ago
B
Retailer 14
-
$1,182 USD
£931 GBP
View
Most Expensive
B
Brilliant Earth
19891465A · Oct 31
$1,730 USD
View
14 more retailers have this diamond
Prices start from $238 USDSave up to $1,492 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
1.65ct Round
$238 USD