Round|Lab Grown|GIA

3.09ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • GIA 2487357247

Certificate GIA 2487357247

Diamond specifications and retailer prices

From $1,358 USD
As of November 5, 2026
Save $1,922 USD (59%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $3,280 USD at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 3.09ct lab-grown round diamond

This 3.09ct lab-grown round sits in the three to five carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2487357247. Listed at 5 retailers as of October 31, 2026, with prices from $1,358 to $3,280, a $1,922 spread on the same certified stone. Blue Nile lists it at $3,280. 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

3.09
Carat
D
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.8°
OriginLab Grown
Grading LabGIA
CertificateGIA 2487357247
Dimensions9.41 × 9.39 × 5.72 mm
L/W Ratio1.00
Star length50%
Lower girdle75%
Top View
9.41 mm9.39 mm3.09 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2487357247
Side View
Table 58.0%Crown 34.5°Girdle: MediumPavilion 40.8°Culet: NoneDepth 60.8%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $3,280 USD|Low: $1,185 USD|High: $6,839 USD|Avg: $2,795 USD
Blue Nile
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
Retailer 15
Retailer 16
October 29, 2026
Retailer 6$1,356 USD
Retailer 10$1,358 USD
Retailer 12$1,374 USD
Retailer 2$1,478 USD
Retailer 9$1,575 USD
Retailer 15$1,589 USD
Retailer 14$1,605 USD
Retailer 13$1,701 USD
Retailer 16$2,657 USD
Retailer 11$2,953 USD
Blue Nile$3,280 USD
Retailer 5$3,863 USD
Retailer 3$4,430 USD
Retailer 8$4,430 USD
Retailer 7$4,470 USD
Retailer 4$6,839 USD

10 data points across 16 retailers

5 retailers$1,358 USD to $3,280 USD

B+
Cheapest Retailer
-
$1,358 USD
B+
Retailer 2
-
$1,478 USD
View
B+
Retailer 3
-
$1,575 USD
View
B
Retailer 4
-
$2,953 USD
View
Most Expensive
B
Blue Nile
24787994 · Oct 31
$3,280 USD
View
4 more retailers have this diamond
Prices start from $1,358 USDSave up to $1,922 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.

B+
3.09ct Round
$1,358 USD