You Searched For: Mineral oil medium

+ward’ssciencewardsci.com800-962-2660 Gneiss Type: Metamorphic; regional. Texture/Appearance: Foliated often with distinct banding (segregation) of minerals; some preferred orientation in micas (platy) or hornblende (prismatic crystals). Medium to...

ward’s sciencewardsci.com800-962-2660 Barite BaSO4 (Barite Group) Crystallography: Orthorhombic; 2/m2/m2/m. Crystals usually tabular on {001}; often diamond-shaped. May also be coarsely laminated; granular earthy. Physical Properties: Cleavage: {0...

+ward’ssciencewardsci.com800-962-2660 Schist Type: Metamorphic; regional. Texture/Appearance: Fine to coarse-grained strongly foliated. Granoblastic grading into porphyrob- lastic with mineral segregation banding usually present. Individual minera...

wardsci.com 800-962-2660 Peridotite Type: Igneous; intrusive. Texture/Appearance: Medium to coarse-grained; massive granular sometimes porphyritic. Color: Medium gray to greenish-gray. Mineralogy/Chemistry: Ultramafic with mafic minerals greater t...

wardsci.com 800-962-2660 Hornblende (CaNa)2-3 (MgFeAl)5 SI6 (SiAl)2 O22 (OH)2 (Amphibole Group) Crystallography: Monoclinic: 2/m. Crystals prismatic usually terminated by {011}. May be columnar to fibrous; coarse-to fine-granular. Physical Propert...

+ward’ssciencewardsci.com800-962-2660 Tuff Type: Igneous; extrusive (pyroclastic). Texture/Appearance: Clastic texture with angular rock and mineral fragments and lapilli mixed with fine-grained volcanic ash partly cemented by sedimentary material...

+ward’ssciencewardsci.com800-962-2660 Shale Type: Sedimentary; clastic. Texture/Appearance: Very fine-grained (clay to silt-sized particles) grains not distinguishable to the naked eye. A relatively soft rock with fine laminae; may display carbona...

ward’s sciencewardsci.com800-962-2660 Gabbro Type: Igneous; intrusive. Texture/Appearance: Granular; medium-grained. Color: Dark medium gray green-gray or brownish-gray. Mineralogy/Chemistry: Mafic; with essential plagioclase (50%-75%) and pyroxen...

+ward’ssciencewardsci.com800-962-2660 Staurolite (Fe+2 Mg Zn)2 Al9 (Si Al)4 O22 (OH)2 Crystallography: Monoclinic (pseudo-orthorhombic); 2/m. Crystals prismatic with common forms {110} {001} and {101}. Cruciform twins very common (at nearly 90° an...

wardsci.com 800-962-2660 Granite Type: Igneous intrusive. Texture/Appearance: Massive medium to coarse-grained; holocrystalline sometimes porphyritic. Color: White light gray pink or red. Mineralogy/Chemistry: Felsic; composed primarily of quartz ...

wardsci.com 800-962-2660 Talc Mg3 Si4 O10 (OH)2 Crystallography: Monoclinic; 2/m. Rarely in crystals; more often in foliated masses or compact fine- grained aggregates. Compact and massive varieties known as steatite or soapstone. Physical Propert...

+ward’ssciencewardsci.com800-962-2660 Andesite Type: Igneous; extrusive. Texture/Appearance: Generally fine-grained aphanitic. Massive structure often porphyritic with phenocrysts standing out in a vitreous or fine-grained groundmass. Color: Dark ...

ward’s sciencewardsci.com800-962-2660 Hornfels Type: Metamorphic regional. Texture/Appearance: Homogeneous; dense fine-grained. Granoblastic; may have porphyroblasts or any of the minerals present. Color: Varies; light to dark. May be pink brown g...

+ward’ssciencewardsci.com800-962-2660 Anorthosite Type: Igneous; intrusive. Texture/Appearance: Medium to coarse-grained equigranular with elongated tabular plagioclase. Color: Dark gray to bluish-gray sometimes lighter shades. Mineralogy/Chemistr...

wardsci.com 800-962-2660 Opal SiO2 • nH2O Crystallography: None amorphous. Massive often in rounded and botryoidal forms sometimes pisolitic. Physical Properties: Cleavage: None; conchoidal fracture. Hardness: 5.0-6.0. Specific Gravity: 2.0-2.25. ...

Drosophila Drosophila melanogaster is an excellent organism for use in the study of genetics. Its small size relative ease of mainte- nance short life cycle and its ability to produce many offspring have lent it to the demonstration of Mendelian i...