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Round|Natural|GIA

2.09ct D SI1 Round Natural Diamond

ID • D/SI1 • GIA 5

Certificate GIA 5

Diamond specifications and retailer prices

From $31,517 AUD
$22,139 USD
As of October 30, 2026
Save $6,026 AUD (16%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $37,543 AUD at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 2.09ct natural round diamond

This 2.09ct natural round sits in the two to three carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA. Listed at 3 retailers as of October 30, 2026, with prices from $31,517 to $37,543, a $6,026 spread on the same certified stone. Blue Nile lists it at $37,543. 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

2.09
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 5
Dimensions8.15 × 8.19 × 5.09 mm
L/W Ratio1.00
Top View
8.15 mm8.19 mm2.09 ctD / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 5
Side View
Table 56.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 62.3%

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: Oct 30
Current: $37,543 AUD|Low: $31,207 AUD|High: $37,543 AUD|Avg: $34,186 AUD
Blue Nile
Retailer 2
Retailer 3
September 23, 2026
Retailer 2$31,517 AUD
Retailer 3$33,830 AUD
Blue Nile$37,543 AUD

3 data points across 3 retailers

3 retailers$31,517 AUD to $37,543 AUD

B+
Cheapest Retailer
-
$31,517 AUD
$22,139 USD
B+
Retailer 2
-
$33,830 AUD
$23,764 USD
View
Most Expensive
B
Blue Nile
12447788 · Oct 31
$37,543 AUD
$26,372 USD
View
2 more retailers have this diamond
Prices start from $31,517 AUDSave up to $6,026 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+
2.09ct Round
$31,517 AUD