Moldavites contain bubbles
Moldavite volume is about 1% – get more info. South Bohemia moldavites contain more bubbles that the Moravian moldavites. Although all moldavites have bubbles, not all of them are visible to the naked eye. Bubbles can be as small as a centimetre or a few millimetres in size.
Smooth walls are found in bubbles. A bubble’s shape can be spherical or lens-like. Sometimes bubbles can grow so long that they create channels.
Bubbles can be scattered or placed in lines or groups. Fluidality is the direction in which tectile melts flow at high viscosity. Oblong bubbles or channels can be oriented in the exact same way as fluidality.
Bubbles have a very low pressure (almost zero).
Bubbles are born
The majority of bubbles are a result of gas residues in parent material. These bubbles can also occur due to internal tension in the hardening process of moldavite-molten glass.
Bubbles that are open-ended
Open bubbles can grow up to several centimeters in size on the surface of moldavites. You can either partially open them by etching the moldavite’s surface, or fully open them. These bubbles were created by moldavite breaking. Some bubbles may be partially filled by sediment, or – rarer – by ferruginous Sandstone.