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Round|Natural|GIA

0.85ct I SI2 Round Natural Diamond

VG • I/SI2 • GIA 1278133423

Certificate GIA 1278133423

Diamond specifications and retailer prices

From $1,700 USD
£1,338 GBP
As of October 30, 2026
Save $999 USD (37%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $2,699 USD at MOH London · As of October 29, 2026
View at MOH London

About this 0.85ct natural round diamond

This 0.85ct natural round sits in the just-under-one-carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by GIA 1278133423. Listed at 4 retailers as of October 29, 2026, with prices from $1,700 to $2,699, a $999 spread on the same certified stone. MOH London lists it at $2,699. 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

0.85
Carat
I
Color
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.5°
Pavilion angle40.2°
OriginNatural
Grading LabGIA
CertificateGIA 1278133423
Dimensions5.95 × 5.91 × 3.79 mm
L/W Ratio1.01
Star length55%
Lower girdle80%
Top View
5.95 mm5.91 mm0.85 ctI / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1278133423
Side View
Table 56.0%Crown 37.5°Girdle: THN-THKPavilion 40.2°Culet: NoneDepth 63.9%

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: Oct 30
Current: $2,699 USD|Low: $1,290 USD|High: $2,717 USD|Avg: $1,812 USD|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 30, 2026
Retailer 4$1,290 USD
Retailer 5$1,426 USD
Retailer 2$1,700 USD
Retailer 3$2,090 USD
MOH London$2,699 USD

40 data points across 5 retailers

4 retailers$1,700 USD to $2,699 USD

Retailer 1
-
$1,290 USD
Price last confirmed 9 days ago
B+
Retailer 2
-
$1,700 USD
£1,338 GBP
View
B
Retailer 3
-
$2,090 USD
€1,990 EUR
View
Most Expensive
B
MOH London
F6CC1DA01 · Oct 29
$2,699 USD
£2,125 GBP
View
3 more retailers have this diamond
Prices start from $1,700 USDSave up to $999 USD

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
$1,700 USD