Search results: “CHALCEDONY” – Page 1
Showing 1–15 of 23 results
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Australian Minerals, Minerals of the World
CHALCEDONY COPPER
CHALCEDONY COPPER
Aussie Chalcedony Copper Specimen with Malachite for your mineral collection. An interesting Copper metal specimen with many associated minerals from the Kapunda Copper Mine. Check out the pics to see details of tiny Quartz crystals on botryoidal Chalcedony. I can also see Cuprite and some other unidentified minerals in this specimen.
Location:
Kapunda Copper Mine, Kapunda, South Australia, Australia.Dimensions:
8.5cm x 1.6cm x 5.5cm, 284g.SKU: AM23CC01 -
Australian Minerals, Minerals of the World
CHALCEDONY MANGANESE
Aussie Chalcedony Manganese specimen for sale. An interesting botryoidal grey blue Chalcedony on black Manganese to add to your Aussie collection. Rarely offered for sale and not often collected as it’s not the prettiest looking rock on the ground. From the famous fossicking area of Mount Isa.
Location:
Hardway Mine, Mount Isa, Queensland, Australia.Dimensions:
7cm x 7.4cm x 6cm, 210g.CHALCEDONY
Chalcedony is a variety of Quartz. A general term for all varieties of quartz that are made of microcrystalline varieties of quartz. Examples are the different types of agate, jasper, chert, chrysoprase, onyx, pietersite, etc.
Mentioned by Agricola (1546) of a stone named for the town of Chalcedon, and is a district within the city of Istanbul, Turkey.MANGANESE
MnManganese is named from a corruption of the latin word for magnestism; magnes, in allusion to its prinicple ore’s magnetic properties. Manganese crystals have yet to be found in nature, therefore it is technically not a mineral. Laboratory grown specimens can look like a natural stone.
The element manganese is an essential element in people’s daily food consumption and has several industrial uses. Manganese is used in steel alloys to increase many favorable characteristics such as strength, hardness and durability. In fact steel can not be produced without manganese; it is an essential ingredient in the process. Manganese is also used to colour glass an amethyst colour. That is not so surprising since manganese is the trace element responsible for quartz’s purple variety, amethyst.
Manganese colouring ability in minerals is well known and appreciated. Manganese is chiefly responsible for the wonderful colours in rhodochrosite, purpurite, rhodonite, serandite and spessartine to name a few. Unfortunately most manganese oxide minerals tend to be black. Manganese is extracted from the ore minerals of pyrolusite and rhodochrosite. Manganese nodules on the sea floor may one day provide an economic ore source.
Properties
Colour is steel or silver grey.
Luster is metallic.
Transparency: Specimens are opaque.
Crystal System is isometric.
Crystal Habits include only lab grown specimens.
Specific Gravity is 7.44 (very heavy for a metallic mineral).
Notable Occurrences include only lab grown specimens.
Best Field Indicators are colour and density.Chek out Manganese Mn specimens for sale here.
SKU: AM23CM01 -
Crystals, Minerals of the World, Quartz
BLUE CHALCEDONY 1
A beautiful natural Blue Chalcedony. Pastel blue crystals inside and blue banding along the edges. This stone has great colour and will make a good collection piece. An unusual treasure-find.
Location:
Malawi, Africa.Dimensions:
14.5cm x 11.5cm x 6.8cm, 691g.CHALCEDONY
SKU: C22BC01 -
Crystals, Minerals of the World, Quartz
BLUE CHALCEDONY 2
A beautiful natural Blue Chalcedony. Pastel blue crystals inside and blue banding along the edges. This stone has great colour and will make a good collection piece. An unusual treasure-find.
Location:
Malawi, Africa.Dimensions:
11.4cm x 6.4cm x 5.2cm, 266g.CHALCEDONY
SKU: C22BC02 -
Crystals, Minerals of the World, Quartz
BLUE CHALCEDONY 3
A beautiful natural Blue Chalcedony. Pastel blue crystals inside and blue banding along the edges. This stone has great colour and will make a good collection piece. An unusual treasure-find.
Location:
Malawi, Africa.Dimensions:
8.3cm x 6cm x 4.8cm, 265g.CHALCEDONY
SKU: C22BC03 -
Crystals, Minerals of the World, Quartz
BLUE CHALCEDONY 4
A beautiful natural Blue Chalcedony. Pastel blue crystals inside and blue banding along the edges. This stone has great colour and will make a good collection piece. An unusual treasure-find.
Location:
Malawi, Africa.Dimensions:
7.7cm x 5cm x 6.3cm, 228g.CHALCEDONY
SKU: C22BC04 -
Crystals, Minerals of the World, Quartz
BLUE CHALCEDONY 5
A beautiful natural Blue Chalcedony. Pastel blue crystals inside and blue banding along the edges. This stone has great colour and will make a good collection piece. An unusual treasure-find.
Location:
Malawi, Africa.Dimensions:
7.1cm x 6.4cm x 4cm, 179g.CHALCEDONY
SKU: C22BC05 -
Crystals, Minerals of the World, Quartz
BLUE CHALCEDONY 6
A beautiful natural Blue Chalcedony. Pastel blue crystals inside and blue banding along the edges. This stone has great colour and will make a good collection piece. An unusual treasure-find.
Location:
Malawi, Africa.Dimensions:
6.4cm x 5cm x 2.4cm, 109g.CHALCEDONY
SKU: C22BC06 -
Crystals, Minerals of the World, Quartz
BLUE CHALCEDONY 7
A beautiful natural Blue Chalcedony. Pastel blue crystals inside and blue banding along the edges. This stone has great colour and will make a good collection piece. An unusual treasure-find.
Location:
Malawi, Africa.Dimensions:
6cm x 4.9cm x 6.5cm, 158g.CHALCEDONY
SKU: C22BC07 -
Crystals, Minerals of the World, Quartz
BLUE CHALCEDONY 8
A beautiful natural Blue Chalcedony. Pastel blue crystals inside and blue banding along the edges. This stone has great colour and will make a good collection piece. An unusual treasure-find.
Location:
Malawi, Africa.Dimensions:
7.4cm x 5.7cm x 3.8cm, 156g.CHALCEDONY
SKU: C22BC08 -
Polished Stones, Spheres
CARNELIAN SPHERE 3
A beautiful Carnelian Sphere 3. Stunning tones of Orange, Red and White with golden glows when the sun shine through. Carnelian is a silica mineral from the chalcedony family, coloured by the presence of iron oxide. Comes with a free low profile hematite ring stand. Check out the stunning pics of this individual sphere on this page.
Dimensions:
6.4cm diameter, 361g.Location:
Madagascar.SKU: S22003 -
Australian Minerals, Chrysoprase, Rock 'n Slabs, Slabs, Slabs
CHRYSOPRASE SLAB COMBO
Chrysoprase Slab Combo of great coloured cutting material for sale. A great Aussie Gemstone worthy for a scoop. The Slabs have been tumble polished. Would be a great colour splash addition to a collection or make several jewellery pieces. One Slab of Apple Green Chrysoprase and another Slab of Lemon Chrysoprase to take your fancy.
Location:
Marlborough, Queensland, Australia.Dimensions:
Green Chrysoprase, 6.3cm x 4.6cm x 0.8cm, 36g.
Lemon Chrysoprase, 5.1cm x 3.2cm x 0.8cm, 26g.Chrysoprase
SKU: C23S02 -
Chrysoprase, Rock 'n Slabs
CHRYSOPRASE SLAB LEMON
Beautiful Chrysoprase Slab Lemon Aussie stone. An amazing colour for a stone of light Lemon shades. Usually reserved for jewellers, quality specimens like this are hard to come by and attract high prices. The slab is good thickness and looks great. A great Aussie Gemstone. This is a good specimen for collection, but I think it will be made into jewellery. This material is called Lemon Chrysoprase and seldom seen available to buy. The slab has been tumble polished.
This material was fossicked many years ago.
Location:
Marlborough, Queensland, Australia.Dimensions:
7.2cm x 3.7cm x 0.8cm, 45g.CHRYSOPRASE
SKU: B0303 -
Australian Minerals, Chrysoprase, Rock 'n Slabs, Slabs, Slabs
CHRYSOPRASE SLAB 1
Chrysoprase Slab 1 of great coloured cutting material for sale. This beautiful stone has a colour contrast that is complementary. A great Aussie Gemstone worthy for a scoop. The Slab has been tumble polished. A fairly fat cut making a chunky slab, would be a great colour splash addition to a collection or make several jewellery pieces.
Location:
Marlborough, Queensland, Australia.Dimensions:
13cm x 3.7cm x 1.3cm, 105g.Chrysoprase
SKU: B1302-2 -
Australian Minerals, Chrysoprase, Polished Stones, Rock 'n Slabs
CHRYSOPRASE CHUNK SPECIMEN
Large Chrysoprase Chunk Specimen with great green colour. It is translucent showing the grain, colour banding and slightly porous. Great for carving or as a brightly apple coloured mineral specimen. This is from very old stock. Stunning. Two flat cut faces really shows the interior of this Chrysoprase.
Location:
Marlborough, Queensland, Australia.Dimensions:
12cm x 7.3cm x 4.3cm, 422g.CHRYSOPRASE
Chrysoprase, chrysophrase or chrysoprasus is a gemstone variety of chalcedony a cryptocrystalline form of silica that contains small quantities of nickel. The best colour is apple green which imitates Imperial Jade from Asia, but varies from deep green, blue grey to lemon. The darker varieties are called prase.
SKU: CH2301