Search results: “blue agate”
Showing 1–15 of 17 results
- Crystals, Minerals of the World, Quartz
BLUE LACE AGATE 1
A beautiful natural Blue Lace Agate 1. Pastel blue banding. This stone has great colour and will make a good collection piece. Blue Lace Agate Rough ready for lapidary work and slabbing. An unusual treasure-find.
Location:
Malawi, Africa.Dimensions:
8.2cm x 5.5cm x 5.4cm, 388g.SKU: C22BLA01 - 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 - Minerals of the World, Quartz, Top Shelf
BLUE QUARTZ CRYSTALS
An amazing cluster of rare Blue Quartz Crystals. Featuring very well formed crystals, clustered over a chunk of rock. This is a rare mineral specimen and a must for any quartz collection. Blue Quartz crystals are Dipyramidal shape. Dipyramidal Crystals don’t form the more common upright quartz clusters most people associate with quartz. The blue colouration is due to inclusions of Magnesioriebeckite. This is old stock and a must have for the quartz or mineral collector.
Location:
Cantera Juanona, Antequera, Malaga, Spain.Dimensions:
4.4cm x 3.3cm x 2.3cm, 24g.Quartz: SiO2.
Magnesioriebeckite: {Na2}{Mg3Fe23+}(Si8O22)(OH)2
SKU: G0305 - Crystals, Minerals of the World
BLUE CHALCEDONY CRYSTALS
BLUE CHALCEDONY CRYSTALS
Beautiful natural Blue Chalcedony Crystals. 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:
6.1cm x 4.9cm x 4.4cm, 123g.CHALCEDONY
SKU: MA1007 - Crystals, Minerals of the World, Quartz
BLUE CHALCEDONY
BLUE CHALCEDONY
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:
6.1cm x 4.7cm x 4.1cm, 108g.CHALCEDONY
SKU: MW8060 - Crystals, Minerals of the World, Quartz
BLUE QUARTZ CLUSTER 90
A cluster of perfect little bi-pyramidal Blue Quartz crystals 90 on matrix. Rare and quite unique, this natural mineral is only found in Spain. The blue colour is caused by Magnesiorebeckite inclusions in the quartz.
Location:
Cantera Juanona, Antequera, Malaga, Andalusia, Spain.Dimensions:
3.5cm x 6cm x 5cm, 141g.Quartz: SiO2.
SKU: WEB0046 - 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 - Rock 'n Slabs, Slabs
AUSSIE ROCK LOT PREHNITE
AUSSIE ROCK LOT PREHNITE. A bunch of rocks from the bottom of our 14″ saw. We cleaned them and they need a new home and possibly some work to turn them into jewellery pieces. The rocks mainly Prehnite and a black and white agate from Agate Creek along with a Chevron Amethyst from NT.
Location:
Wave Hill, NT, Australia.Dimensions:
1431g.Prehnite: Ca2 Al2 Si3 O10(OH)2
Calcium Aluminum Silicate Hydroxide.
SKU: B0361-1