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Round|Natural|GIA

1.33ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 1535150612

Certificate GIA 1535150612

Diamond specifications and retailer prices

From $5,501 AUD
As of November 6, 2026
Save $2,338 AUD (30%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $7,839 AUD at 77 Diamonds · As of November 6, 2026
View at 77 Diamonds

About this 1.33ct natural round diamond

This 1.33ct 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 1535150612. Listed at 4 retailers as of November 6, 2026, with prices from $5,501 to $7,839, a $2,338 spread on the same certified stone. 77 Diamonds lists it at $7,839. 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

1.33
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1535150612
Dimensions6.98 × 7.01 × 4.40 mm
L/W Ratio1.00
Key to symbols
Crystal, Needle
Top View
6.98 mm7.01 mm1.33 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1535150612
Side View
Table 57.0%CrownGirdle: MED-STKPavilion 41°Culet: NoneDepth 62.9%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: $7,839 AUD|Low: $5,427 AUD|High: $7,996 AUD|Avg: $6,709 AUD|+0.8%
77 Diamonds
Retailer 2
November 6, 2026
Retailer 2$5,501 AUD
77 Diamonds$7,839 AUD

37 data points across 2 retailers

4 retailers$5,501 AUD to $7,839 AUD

B+
Cheapest Retailer
-
$5,501 AUD
B+
Retailer 2
-
$5,545 AUD
View
B
Retailer 3
-
$5,770 AUD
View
Most Expensive
B
77 Diamonds
RBZNXB6SSAG · Nov 6
$7,839 AUD
£4,321 GBP
View
3 more retailers have this diamond
Prices start from $5,501 AUDSave up to $2,338 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+
1.33ct Round
$5,501 AUD