Some
of the most impressive crystals seen today are formed in Geodes(cathedrals
when cut in half ). Rock is formed in many ways. When volcanic
material forms, large bubbles are often trapped in the rock.
Over millions of years, these bubbles form a coating on the
inner surface of minerals from the surrounding soil. If water
does not seep through this material, fine crystals will form
that eventually become the marvellous masses of crystals we
see today. Some of these cavities fill with minerals completely,
like Agates, while others only coat the surface, like the
magnificent Amethyst Geodes.
Geodes
Inside geodes we can find a wide selection of crystal types,
at times there may be a mixture where the chemical composition
has changed over millions of years, and so different crystals
are allowed to form.
Amethyst
Cathedrals / caves, Rio Grande de sul, Brazil, From
$30 per kg to $150 per Kg, depending on quality
Amethyst
Cathedrals, caves, Rio
Grande de sul, Brazil, From
$30 per kg to $150 per Kg depending on quality
Amethyst
Cathedrals / caves, Rio Grande de sul, Brazil, From
$30 per kg to $150 per Kg, depending on quality
Amethyst
cathedrals / caves / geodes with calcite inclusions
Amethyst
Geode / cave
Ammethyst
cathedral / cave with large calcite crystal
Calcite
zeolite Geode, Nasik India
Amethyst
cathedrals / caves / Geodes
Amethyst
cathedrals / caves
Amethyst
cathedrals / caves
geodes
/ caves
cathedrals
/ caves, $900, 21cm x 51cm x 12cm, 10kg
Note: All Prices on the Crystal World
Web Site are in Australian dollars unless otherwise stated.
