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Round|Natural|GIA

1.29ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 387

Certificate GIA 387

Diamond specifications and retailer prices

From $2,314 USD
As of November 4, 2026
Save $415 USD (15%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $2,729 USD at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 1.29ct natural round diamond

This 1.29ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA. Listed at 3 retailers as of November 4, 2026, with prices from $2,314 to $2,729, a $415 spread on the same certified stone. Blue Nile lists it at $2,729. 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

1.29
Carat
K
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishGood
SymmetryGood
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 387
Dimensions6.90 × 6.94 × 4.36 mm
L/W Ratio1.01
Top View
6.90 mm6.94 mm1.29 ctK / SI1
OriginNatural
CutExcellent
PolishGood
SymmetryGood
FluorescenceFaint
CertificateGIA 387
Side View
Table 56.0%CrownGirdle: Thin - Sli. ThickPavilionCulet: NoneDepth 62.9%

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: Nov 4
Current: $2,729 USD|Low: $2,314 USD|High: $2,889 USD|Avg: $2,529 USD|-5.5%
Blue Nile
Retailer 2
Retailer 3
October 28, 2026
Retailer 3$2,314 USD
Retailer 2$2,315 USD
Blue Nile$2,729 USD

12 data points across 3 retailers

3 retailers$2,314 USD to $2,729 USD

A
Cheapest Retailer
-
$2,314 USD
A
Retailer 2
-
$2,315 USD
View
Most Expensive
B+
Blue Nile
30169346 · Nov 5
$2,729 USD
View
2 more retailers have this diamond
Prices start from $2,314 USDSave up to $415 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
1.29ct Round
$2,314 USD