Minerals: Pyrite (striated), Siderite, Hematite.
– Field of View: 7 cm (appr.)
– Found: Italy (Elba Island)
Photo: Leo Jahaan

Rock: Known as ‘Rainforest Jasper’, actually highly silicified Rhyolite (a type of volcanic rock) with inclusions of various minerals, particularly green Celadonite and Bentonite clay. In this specimen ancient volcanic gas bubbles have left cavities which were later filled with common white Opal, while other specimens often feature sharply angular cavities filled with Agate and Quartz. ‘Rainforest Jasper’ is only found in one locality.
– Field of View: 4 cm (appr.)
– Found: Australia (Mount Hay, QLD)
Photo: Leo Jahaan

Mineral: Muscovite (floater).
– Specimen Size: 30 x 25 x 16 mm (appr.)
– Found: Brazil (Galileia, Minas Gerais)
Photo: Leo Jahaan

Decription: Muscovite (detail).
– Field of View: 15 mm (appr.)
– Found: Brazil (Galileia, Minas Gerais)
Photo: Leo Jahaan

Decription: Muscovite (detail – rear).
– Field of View: 12 mm (appr.)
– Found: Brazil (Galileia, Minas Gerais)
Photo: Leo Jahaan

Minerals: Thomsonite (botryoidal), Basalt matrix.
– Field of View: 2.5 cm (appr.)
– Found: Czech Republic (Bohemia)
Photo: Leo Jahaan