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Round|Lab Grown|IGI

1.70ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG665408550

Shape and cutting style on the report: Round brilliant

Certificate IGI LG665408550

Diamond specifications and retailer prices

From $260 USD
As of October 29, 2026
Save $1,124 USD (81%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $1,384 USD at Reve Diamonds · As of November 1, 2026
View at Reve Diamonds

About this 1.7ct lab-grown round diamond

This 1.7ct 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 LG665408550 or 665408550. Listed at 20 retailers as of October 29, 2026, with prices from $260 to $1,384, a $1,124 spread on the same certified stone. Reve Diamonds lists it at $1,384. 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

1.70
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG665408550
Dimensions7.68 × 7.62 × 4.74 mm
L/W Ratio1.01
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
7.68 mm7.62 mm1.70 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG665408550
Side View
Table 56.0%Crown 35°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.1%

Caratlytics Score

How it works →
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: $502 USD|Low: $247 USD|High: $1,384 USD|Avg: $716 USD|-0.1%
Retailer 1
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Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Reve Diamonds
November 1, 2026
Retailer 8$260 USD
Retailer 16$301 USD
Retailer 3$322 USD
Retailer 4$322 USD
Retailer 15$480 USD
Retailer 1$502 USD
Retailer 5$537 USD
Retailer 12$552 USD
Retailer 17$555 USD
Retailer 2$592 USD
Retailer 13$610 USD
Retailer 11$614 USD
Retailer 6$859 USD
Retailer 18$950 USD
Retailer 9$1,035 USD
Retailer 7$1,086 USD
Retailer 10$1,170 USD
Retailer 14$1,297 USD
Reve Diamonds$1,384 USD

36 data points across 19 retailers

20 retailers$260 USD to $1,384 USD

A
Cheapest Retailer
-
$260 USD
A
Retailer 2
-
$301 USD
View
A
Retailer 3
-
$322 USD
View
A
Retailer 4
-
$322 USD
View
Price last confirmed 7 days ago
A
Retailer 5
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$480 USD
View
A
Retailer 6
-
$502 USD
£395 GBP
View
A
Retailer 7
-
$537 USD
View
A
Retailer 8
-
$552 USD
€526 EUR
View
A
Retailer 9
-
$555 USD
View
B+
Retailer 10
-
$592 USD
View
B+
Retailer 11
-
$610 USD
A$938 AUD
View
B+
Retailer 12
-
$614 USD
£483 GBP
View
B+
Retailer 13
-
$859 USD
View
Retailer 14
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$994 USD
View
Price last confirmed 90 days ago
Retailer 15
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$1,026 USD
View
Price last confirmed 41 days ago
B
Retailer 16
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$1,035 USD
View
B
Retailer 17
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$1,086 USD
View
B
Retailer 18
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$1,170 USD
View
B
Retailer 19
-
$1,297 USD
£1,021 GBP
View
Most Expensive
B
Reve Diamonds
14EF649A2 · Nov 1
$1,384 USD
View
19 more retailers have this diamond
Prices start from $260 USDSave up to $1,124 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
1.70ct Round
$260 USD