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Round|Natural|GIA

1.55ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 6551332767

Certificate GIA 6551332767

Diamond specifications and retailer prices

From $2,267 AUD
As of November 4, 2026
Save $4,048 AUD (64%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $6,315 AUD 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 $2,267 to $6,315, a $4,048 spread on the same certified stone. NZ Jewellers lists it at $6,315. 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $6,315 AUD|Low: $2,248 AUD|High: $6,634 AUD|Avg: $3,569 AUD|-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$2,267 AUD
Retailer 6$2,756 AUD
Retailer 7$3,021 AUD
Retailer 5$3,160 AUD
Retailer 9$3,173 AUD
Retailer 2$3,290 AUD
Retailer 8$3,486 AUD
Retailer 3$4,098 AUD
NZ Jewellers$6,315 AUD

42 data points across 9 retailers

8 retailers$2,267 AUD to $6,315 AUD

A
Cheapest Retailer
-
$2,267 AUD
B+
Retailer 2
-
$2,756 AUD
View
B+
Retailer 3
-
$3,021 AUD
View
B+
Retailer 4
-
$3,160 AUD
View
B+
Retailer 5
-
$3,290 AUD
View
B+
Retailer 6
-
$3,486 AUD
View
B+
Retailer 7
-
$4,098 AUD
View
Most Expensive
B
NZ Jewellers
76b289ab-a5c6-4a5f-a7d7-07e20680fbd6 · Nov 5
$6,315 AUD
$4,421 USD
View
7 more retailers have this diamond
Prices start from $2,267 AUDSave up to $4,048 AUD

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
$2,267 AUD