“Volcanic clinkers with Hematite coating. Largest specimen : 4 cm. Collected September 1995 at Dolomieu crater, possibly from the previous 1992 eruption. Thus, considering the 36 eruptions of the Fournaise volcano from 1998 to May 2017 these are real vintage mineral specimens ! ( see chronology of the eruptions : http://www.fournaise.info/eruptions_tableau.php ) Note, the specimens colour changes depending of light (see child photo). This photo is taken with natural light but without direct sunlight exposure. It shows its blue "natural" colour. See also forum talk : www.mindat.org/forum.php?read,6,411895,411919#msg-411919 ”

“Volcanic clinkers with Hematite coating. Largest specimen : 4 cm. Collected September 1995 at Dolomieu crater, possibly from the previous 1992 eruption. Thus, considering the 36 eruptions of the Fournaise volcano from 1998 to May 2017 these are real vintage mineral specimens ! ( see chronology of the eruptions : http://www.fournaise.info/eruptions_tableau.php ) Note, the specimens colour changes depending of light. This photo is taken with natural light but with direct sun exposition. It then shows a silvery colour. See also forum talk : www.mindat.org/forum.php?read,6,411895,411919#msg-411919 ”