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0.85ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 2506747178

Shape and cutting style on the report: Round brilliant

Certificate GIA 2506747178

Diamond specifications and retailer prices

From $1,797 NZD
As of November 5, 2026
Save $423 NZD (19%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $4,869 NZD at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 0.85ct natural round diamond

This 0.85ct natural round sits in the just-under-one-carat band, graded M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2506747178. Listed at 9 retailers as of November 5, 2026, with a relatively tight 24% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

0.85
Carat
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2506747178
Dimensions6.01 × 6.05 × 3.79 mm
L/W Ratio1.01
Star length45%
Lower girdle75%
Top View
6.01 mm6.05 mm0.85 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2506747178
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.8%

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 5
Current: $1,882 NZD|Low: $1,797 NZD|High: $2,300 NZD|Avg: $2,055 NZD|-4.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 4$1,797 NZD
Retailer 1$1,882 NZD
Retailer 2$2,106 NZD
Retailer 3$2,220 NZD

40 data points across 4 retailers

9 retailers$1,797 NZD to $2,220 NZD

Retailer 1
-
$1,553 NZD
Price last confirmed 29 days ago
Retailer 2
-
$1,553 NZD
View
Price last confirmed 29 days ago
Retailer 3
-
$1,612 NZD
View
Price last confirmed 38 days ago
Retailer 4
-
$1,791 NZD
View
Price last confirmed 38 days ago
B+
Retailer 5
-
$1,797 NZD
View
B+
Retailer 6
-
$1,882 NZD
View
B+
Retailer 7
-
$2,106 NZD
View
B
Retailer 8
-
$2,220 NZD
View
Most Expensive
NZ Jewellers
70a3d954-3adc-4ed3-a454-dd9656884054 · Sep 28
$4,869 NZD
$2,737 USD
View
Price last confirmed 39 days ago
8 more retailers have this diamond
Prices start from $1,797 NZDSave up to $423 NZD

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+
0.85ct Round
$1,797 NZD