There is also a discrepancy in radiometric and stratigraphic test ages

This is a beautiful piece of eudialyte from Abitibi-Temiscamingue

8 Carats / 13

The weight and dimensions of the glass pieces are as follows:

Star Mica Metamorphic Rock with Quartz | 43.7g | Muscovite | Brazil | SO24 Spinel There is also a discrepancyThis is a specimen of Star Mica or Muscovite and Quartz cluster. These clusters show crystals that grow in sheets or book formations. It is silvery gold with good transparency when held up to the light. The name Muscovite comes from the term Muscovy Glass which was a name for the thick sheets of Mica used as a substitute for glass Russia. The name Mica is derived from the Greek word that means to split. On this nice specimen, the matrix faces are