Gem Gallery @gemgallery - Tumblr Blog

angelnumber27

Grape agate

vugnasmineralblog

Agate Stará Paka, Jičín, Hradec Králové Region, Czech Republic

bijoux-et-mineraux

Tangerine (Hematite) Quartz - Madagascar

vugnasmineralblog

Calcite Příbram District, Central Bohemian Region, Czech Republic, Europe

vugnasmineralblog

Analcime Gran Canaria, Las Palmas Province, Canary Islands, Spain

geologypage

Ruby #Geology #GeologyPage #minerals #Myanmar

Locality: Mogok Township, Mandalay Division, Burma (Myanmar)

Size: 5.7 x 5.1 x 1.8 cm

Geology Page www.geologypage.com — view on Instagram https://scontent-iad3-1.cdninstagram.com/v/t51.2885-15/150203600_1114236242356368_7628990069704112153_n.jpg?_nc_cat=109&ccb=3&_nc_sid=8ae9d6&_nc_ohc=zVct-B2WFroAX8BHRir&_nc_ht=scontent-iad3-1.cdninstagram.com&oh=115dde6ff8682e267b719f438a070bcc&oe=604D9C1B

underthescopemineral

Chalcophyllite

Cu18Al2(AsO4)4(SO4)3(OH)24·36H2O

Locality:

Salsigne, Aude, Occitanie, France

Field of View: 7 mm

Not so common blue Chalcophyllite.

Elise Chaigneau’s Photo

Chalcophyllite is un uncommon secondary mineral occurring in the oxidised zones of some arsenic-bearing hydrothermal polymetallic deposits. Can be partially dehydrated. Soluble in acids and in ammonia. Water content varies at room temperature based on relative humidity. Alters to Chrysocolla.

hematitehearts

Andradite

Locality: Jebel Bou-Agrao, Khenifra Province, Meknès-Tafilalet Region, Morocco

Size: 4.2 × 3 × 2.9 cm

geologypage

Fluorite & Sphalerite | #Geology #GeologyPage #Minerals

Locality: Huanggang Mine, Hexigten Banner, Chifeng City, Inner Mongolia, China (Peoples Republic)

Size: 4.5 × 3.6 × 1.6 cm

Geology Page www.geologypage.com — view on Instagram https://scontent-iad3-1.cdninstagram.com/v/t51.2885-15/93109146_538089546847661_4042530193543692314_n.jpg?_nc_cat=101&_nc_sid=8ae9d6&_nc_ohc=WgPebtfLbDkAX8rid-I&_nc_ht=scontent-iad3-1.cdninstagram.com&oh=e6b970dfb598136ac9385af0f9f57106&oe=5EBC9323

vugnasmineralblog

Goethite Aghbar Mine, Bou Azzer, Drâa-Tafilalet Region, Morocco

underthescopemineral

Prehnite

Ca2Al2Si3O10(OH)2

Locality:

Oficarsa Quarry (Cerro de las Culebras), Carchelejo, Cárcheles, Jaén, Andalusia, Spain

Largest crystal size: 13 mm

Crystals of prehnite, arranged in a fan, light green.

Collection and photo of Gianfranco Ciccolini.

Prehnite is a secondary or hydrothermal mineral in veins and cavities in ma¯c volcanic rocks; less commonly in granite gneiss or syenite; a typical product of low-grade metamorphism. Extensive deposits of gem-quality prehnite occur in the basalt tableland surrounding Wave Hill Station in the central Northern Territory, of Australia.