Round|Natural|GIA

1.55ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 6551332767

Certificate GIA 6551332767

Diamond specifications and retailer prices

From $1,587 USD
As of November 4, 2026
Save $2,834 USD (64%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $4,421 USD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.55ct natural round diamond

This 1.55ct natural round sits in the one-and-a-half to two carat band, graded M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6551332767. Listed at 8 retailers as of November 4, 2026, with prices from $1,587 to $4,421, a $2,834 spread on the same certified stone. NZ Jewellers lists it at $4,421. 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

1.55
Carat
M
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 6551332767
Dimensions7.36 × 7.42 × 4.62 mm
L/W Ratio1.01
Key to symbols
Crystal, Needle, Indented Natural
Top View
7.36 mm7.42 mm1.55 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 6551332767
Side View
Table 59.0%CrownGirdlePavilionCuletDepth 62.5%

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: $4,421 USD|Low: $1,574 USD|High: $4,644 USD|Avg: $2,498 USD|-4.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 4$1,587 USD
Retailer 6$1,929 USD
Retailer 7$2,115 USD
Retailer 5$2,212 USD
Retailer 9$2,221 USD
Retailer 2$2,303 USD
Retailer 8$2,440 USD
Retailer 3$2,869 USD
NZ Jewellers$4,421 USD

42 data points across 9 retailers

8 retailers$1,587 USD to $4,421 USD

A
Cheapest Retailer
-
$1,587 USD
B+
Retailer 2
-
$1,929 USD
View
B+
Retailer 3
-
$2,115 USD
View
B+
Retailer 4
-
$2,212 USD
View
B+
Retailer 5
-
$2,303 USD
View
B+
Retailer 6
-
$2,440 USD
View
B+
Retailer 7
-
$2,869 USD
View
Most Expensive
B
NZ Jewellers
76b289ab-a5c6-4a5f-a7d7-07e20680fbd6 · Nov 5
$4,421 USD
View
7 more retailers have this diamond
Prices start from $1,587 USDSave up to $2,834 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
1.55ct Round
$1,587 USD