| AMAZONSTONE | • amazonstone n. A bluish-green variety of microcline feldspar used as a gemstone. The best known occurrences are at… • AMAZONSTONE n. a green microcline, aka amazonite. |
| BROWNSTONE | • brownstone n. (Uncountable) A variety of brown to red-brown sandstone once popular as a building material. • brownstone n. (Countable) A row house built of brownstone, especially in New York City. • BROWNSTONE n. a dark variety of sandstone, much used for building purposes. |
| CORNSTONE | • cornstone n. (Mineralogy) A kind of marly siliceous rock. • CORNSTONE n. a silicious limestone favourable for cereal crops. |
| GREENSTONE | • greenstone n. (Archaeology) any of several green-hued minerals used for making various artefacts in early Mesoamerican… • greenstone n. (New Zealand) pounamu, the green-hued minerals of New Zealand used by Māori to make tools, ornaments… • Greenstone prop.n. A surname. |
| GUNSTONE | • gunstone n. (Obsolete) A cannonball. • Gunstone prop.n. A hamlet near Codsall, South Staffordshire district, Staffordshire, England (OS grid ref SJ8704). • Gunstone prop.n. A habitational surname. |
| HORNSTONE | • hornstone n. Hornfels. • HORNSTONE n. an alternative name sometimes given to chert. |
| IRONSTONE | • ironstone n. Any ore of iron which is impure through the admixture of silica or clay. • ironstone n. A type of vitreous pottery similar to stoneware. • IRONSTONE n. a hard, earthy ore of iron. |
| MOONSTONE | • moonstone n. (Mineralogy) A translucent gemstone, an orthoclase feldspar, that has a pearly lustre. • MOONSTONE n. a nearly pellucid variety of feldspar, showing pearly or opaline reflections from within. |
| QUERNSTONE | • quernstone n. Either of a pair of stones used for grinding material by hand. • QUERNSTONE n. a quern, a stone mill for grinding corn. |
| ROTTENSTONE | • rottenstone n. (Geology) A soft, friable limestone, used in polishes. • rottenstone v. (Transitive) To polish with rottenstone. • rotten␣stone n. Alternative form of rottenstone. |
| SPLEENSTONE | • spleen␣stone n. (Archaic) A jade or nephrite stone. • SPLEENSTONE n. (obsolete) jade. |
| SUNSTONE | • sunstone n. (Mineralogy) A translucent form of feldspar having flakes of hematite, used as an ornamental stone. • SUNSTONE n. a variety of quartz. |
| TINSTONE | • tinstone n. The mineral cassiterite. • TINSTONE n. an ore of tin, cassiterite. |
| TURNSTONE | • turnstone n. Either of two species of coastal wading bird, Arenaria interpres and Arenaria melanocephala, that breed… • TURNSTONE n. any of various species of limicoline birds, allied to the plovers. |
| VEINSTONE | • veinstone n. (Geology, mining) Synonym of gangue. • VEINSTONE n. gangue, also VEINSTUFF. |
| WHINSTONE | • whinstone n. A stone used to crush whin for use as winter feed for cattle. • whinstone n. (Quarrying industry) Any hard dark-coloured rock. • WHINSTONE n. a hard and compact rock, also WHUNSTANE. |