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Diameter, mm (1mm - 0,039inch)

Polished stones - full range in stock "Chalcedony"

Chalcedony is a cryptocrystalline variety of quartz. It has a fine fiber structure. It has many varieties, the color of which varies greatly: carnelian, carnelian, sard, heliotrope, chrysoprase, sapphirine (not to be confused with the mineral sapphirine). Used in jewelry. Patterned chalcedony is called agate, black-and-white striped chalcedony is called onyx. Pseudo-stalactites of chalcedony are especially valued among collectors. Known since ancient times. Widely used in ancient Rome and Greece.

You can see chalcedony stone for sale and buy it in the Minerals of Russia online store.

Physical properties of Chalcedony

General
Category Oxide minerals, quartz group
Formula
(repeating unit)
Silica (silicon dioxide, SiO2)
Crystal system Trigonal or monoclinic
Identification
Formula mass 60 g/mol
Color Various
Cleavage Absent
Fracture Uneven, splintery, conchoidal
Mohs scale hardness 6–7
Luster Waxy, vitreous, dull, greasy, silky
Streak White
Diaphaneity Translucent
Specific gravity 2.59–2.61
Code: 2364
Kvarkino, Orenburg region, southern Urals, RF
68*47*10mm

0.00 $ $25.00

Code: 2363
Kvarkino, Orenburg region, southern Urals, RF
68*40*10mm

0.00 $ $25.00

Code: 2362
Kvarkino, Orenburg region, southern Urals, RF
69*44*9mm

0.00 $ $29.95

Code: 918
Pstan, Kazakhstan
76*57*19mm

0.00 $ $98.33

Code: 4424
Golutvin, Moscow region, RF
47*38*14mm

0.00 $ $6.67

Code: 3527
Staritsky quarry, Tver region, RF
39*36*13mm

0.00 $ $11.67

Code: 3528
Staritsky quarry, Tver region, RF
70*43*23mm

0.00 $ $5.00

Code: 2367
Kvarkino, Orenburg region, southern Urals, RF
62*35*12mm

0.00 $ $19.95

Code: 2366
Kvarkino, Orenburg region, southern Urals, RF
59*36*11mm

0.00 $ $25.00

Code: 2365
Kvarkino, Orenburg region, southern Urals, RF
67*44*12mm

0.00 $ $25.00

Code: 1420
Staraya Sitnya, Moscow region, RF
119*67*44mm

0.00 $ $60.00

Code: 196
Pstan, Kazakhstan
56*34*20mm

0.00 $ $50.00

Code: 1..24
Kamyshin, Volgograd region, RF
223*105*31mm

0.00 $ $110.00

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