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Round|Natural|GIA

1.53ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6561157320

Certificate GIA 6561157320

Diamond specifications and retailer prices

From $3,131 USD
As of November 6, 2026
Save $1,109 USD (26%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $4,240 USD at Blue Nile · As of November 3, 2026
View at Blue Nile

About this 1.53ct natural round diamond

This 1.53ct natural round sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6561157320. Listed at 6 retailers as of November 3, 2026, with prices from $3,131 to $4,240, a $1,109 spread on the same certified stone. Blue Nile lists it at $4,240. 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

1.53
Carat
K
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6561157320
Dimensions7.30 × 7.34 × 4.59 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Needle, Natural
Top View
7.30 mm7.34 mm1.53 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6561157320
Side View
Table 56.0%Crown 35.5°Girdle: Slightly ThickPavilion 40.8°Culet: NoneDepth 62.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $4,240 USD|Low: $3,084 USD|High: $4,294 USD|Avg: $3,706 USD|-1.3%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 2$3,131 USD
Retailer 3$3,420 USD
Retailer 6$3,644 USD
Retailer 5$3,922 USD
Retailer 7$4,147 USD
Retailer 4$4,192 USD
Blue Nile$4,240 USD

45 data points across 7 retailers

6 retailers$3,131 USD to $4,240 USD

A
Cheapest Retailer
-
$3,131 USD
A
Retailer 2
-
$3,420 USD
View
B+
Retailer 3
-
$3,922 USD
View
B+
Retailer 4
-
$4,147 USD
View
B+
Retailer 5
-
$4,192 USD
View
Most Expensive
B+
Blue Nile
30420830 · Nov 3
$4,240 USD
View
5 more retailers have this diamond
Prices start from $3,131 USDSave up to $1,109 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
1.53ct Round
$3,131 USD