The volume of moldavite is approximately 1% of its bubble volume. South Bohemia moldavites are more likely to contain bubbles than Moravian mouldavites. Although all moldavites are made up of bubbles some are not visible to the naked eye. The bubble size ranges from a hundredth to a couple of centimetres – more about the author.
The bubble walls have smooth walls. A bubble has a shape that is either spherical and lens-like, as well as oblong. Sometimes bubbles may be so large that they can create channels.
Bubbles may be distributed or found in groups, or lines. Fluidality, which is the direction of the flow of tectile melts at high velocity, refers to orienting channels and bubbles in the same manner as fluidality.
Bubbles exhibit very low pressure (almost like vacuum).
Bubbles and their origin
Most bubbles are made up of the gas residue in parent material. They can also be caused internally by tension when the moldavite is hardened.
Bubbles that can be opened to everyone
You will find open bubbles, which can reach as high as several centimeters on some moldavites’ surfaces. They can either be partially or fully opened by etching on to the moldavite. These are made from moldavite being broken, either by a fall, transporeted, or internal tension. Some bubbles have a partial filling of sediment or, less frequently, ferruginous and ironic sandstone.