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Princess|Natural|GIA

1.51ct K SI1 Princess Natural Diamond

GD • K/SI1 • GIA 2566680556

Certificate GIA 2566680556

Diamond specifications and retailer prices

From $3,700 AUD
As of November 4, 2026
Save $802 AUD (18%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $4,502 AUD at Michael Trio · As of November 6, 2026
View at Michael Trio

About this 1.51ct natural princess diamond

This 1.51ct natural princess sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2566680556. Listed at 4 retailers as of November 4, 2026, with prices from $3,700 to $4,502, a $802 spread on the same certified stone. Michael Trio lists it at $4,502. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
K
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2566680556
Dimensions6.34 × 6.23 × 4.52 mm
L/W Ratio1.02
Culet sizeNone
Key to symbols
Feather, Cloud, Crystal, Needle
Top View
6.34 mm6.23 mm1.51 ctK / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2566680556
Side View
Table 70.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 72.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $4,502 AUD|Low: $3,700 AUD|High: $4,502 AUD|Avg: $4,146 AUD
Michael Trio
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 3$3,700 AUD
Retailer 4$3,888 AUD
Retailer 2$4,174 AUD
Michael Trio$4,502 AUD

14 data points across 4 retailers

4 retailers$3,700 AUD to $4,502 AUD

B+
Cheapest Retailer
-
$3,700 AUD
B+
Retailer 2
-
$3,888 AUD
View
B+
Retailer 3
-
$4,174 AUD
View
Most Expensive
B+
Michael Trio
2672421502 · Nov 6
$4,502 AUD
SGD 4,259 SGD
View
3 more retailers have this diamond
Prices start from $3,700 AUDSave up to $802 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.

B+
1.51ct Princess
$3,700 AUD