Round|Natural|GIA

1.51ct G SI1 Round Natural Diamond

ID • G/SI1 • GIA 294

Certificate GIA 294

Diamond specifications and retailer prices

From $5,758 USD
As of November 4, 2026
Save $10,814 USD (65%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $16,572 USD at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA. Listed at 5 retailers as of November 4, 2026, with prices from $5,758 to $16,572, a $10,814 spread on the same certified stone. Blue Nile lists it at $16,572. 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

1.51
Carat
G
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 294
Dimensions7.31 × 7.35 × 4.58 mm
L/W Ratio1.01
Top View
7.31 mm7.35 mm1.51 ctG / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 294
Side View
Table 58.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 62.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: $6,900 USD|Low: $5,758 USD|High: $13,284 USD|Avg: $8,912 USD|-16.6%
Blue Nile
Retailer 2
Retailer 3
November 4, 2026
Retailer 2$5,758 USD
Blue Nile$6,900 USD
Retailer 3$13,284 USD

12 data points across 3 retailers

5 retailers$5,758 USD to $16,572 USD

A
Cheapest Retailer
-
$5,758 USD
A
Retailer 2
-
$6,900 USD
View
B
Retailer 3
-
$13,284 USD
View
B
Retailer 4
-
$14,299 USD
View
Most Expensive
B
Blue Nile
121719 · Nov 5
$16,572 USD
View
4 more retailers have this diamond
Prices start from $5,758 USDSave up to $10,814 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
1.51ct Round
$5,758 USD