Photo credits

The example stone photos come from Wikimedia Commons under the licenses shown. Thank you to the photographers. Some photos are cropped and resized.

• quartz: Quartz-ckorqtz-38a.jpg by Robert M. Lavinsky, CC BY-SA 3.0
• amethyst: Amethyst 6.jpg by Geology HK, CC BY-SA 4.0
• rose quartz: Rose quartz 2020605 (Jan Helebrant).jpg by Jan Helebrant, CC BY-SA 2.0
• smoky quartz: Smoky quartz - SiO2, on melaphyre rock locality - Doubravice, Czech Republic (50656997938).jpg by Jan Helebrant, CC BY-SA 2.0
• citrine: Citrine améthysée.jpg by Parent Géry, Public domain
• fluorite: Fluorite-Sphalerite-57254.jpg by Robert M. Lavinsky, CC BY-SA 3.0
• granite: Granite 18 (48674314337).jpg by James St. John, CC BY 2.0
• slate: Slate Macro 1.JPG by “Jon Zander (Digon3)”, CC BY-SA 3.0
• beryl: Beryl-0128-01a.jpg by Robert M. Lavinsky, CC BY-SA 3.0
• selenite: Selenite.jpg by 2x910, CC BY-SA 4.0
• sodalite: Sodalite (Mineral).jpg by Philippe Giabbanelli, CC BY-SA 3.0
• agate: Agate Fontasse Perimorphose.jpg by Didier Descouens, CC BY-SA 4.0
• malachite: Malachite-Opal-190490.jpg by Robert M. Lavinsky, CC BY-SA 3.0
• basalt: Basalt 6 (48674790187).jpg by James St. John, CC BY 2.0
• gneiss: Gneiss.2518.JPG by Chris.urs-o, CC BY-SA 3.0
• topaz: Topaz-tuc8-132a.jpg by Robert M. Lavinsky, CC BY-SA 3.0
• halite: Halite-282334.jpg by Robert M. Lavinsky, CC BY-SA 3.0
• rhodochrosite: Rhodochrosite-168693.jpg by Robert M. Lavinsky, CC BY-SA 3.0
• jasper: Jasper-brek4iya.jpg by CrimeaGems (mirmineralov.ru), CC BY-SA 3.0
• azurite: Azurite-76602.jpg by Robert M. Lavinsky, CC BY-SA 3.0
• pumice: Pumice (Holocene, ~7550-7760 a; Route 138 roadcut southeast of Clearwater, Oregon, USA) 5.jpg by James St. John, CC BY 2.0
• schist: Schist, Pelona Schist Formation (55418458878).jpg by Kevin M. Gill, CC BY 4.0
• labradorite: Labradorite plagioclase feldspar (Nain Anorthosite, Mesoproterozoic, 1.29-1.35 Ga; Nain, Labrador, Canada) 6.jpg by James St. John, CC BY 2.0
• muscovite: Muscovite-4jg43b.jpg by Robert M. Lavinsky, CC BY-SA 3.0
• opal: Opal-251114.jpg by Robert M. Lavinsky, CC BY-SA 3.0
• obsidian: Obsidian 40.jpg by James St. John, CC BY 2.0
• hematite: Hematite-117560.jpg by Robert M. Lavinsky, CC BY-SA 3.0
• sandstone: Sandstone.4272.JPG by Chris.urs-o, CC BY-SA 4.0
• garnet: Garnet-Group-133901.jpg by Robert M. Lavinsky, CC BY-SA 3.0
• turquoise: Turquoise-21727.jpg by Robert M. Lavinsky, CC BY-SA 3.0
• biotite: Biotite K(Mg,Fe)3AlSi3O10(F,OH)2 (20245747942).jpg by Jan Helebrant, CC BY-SA 2.0
• geode: Geode detail 02.jpg by James Petts from London, England, CC BY-SA 2.0
• pyrite: Pyrite, Rio Marina, Elba, Italy-8773.jpg by Raimond Spekking, CC BY-SA 4.0
• magnetite: Magnetite-54555.jpg by Robert M. Lavinsky, CC BY-SA 3.0
• limestone: Limestone (Bonanza King Formation, Middle Cambrian; Desert Range, Nevada, USA) 2.jpg by James St. John, CC BY 2.0
• tourmaline: Tourmaline-20995.jpg by Robert M. Lavinsky, CC BY-SA 3.0
• lapis lazuli: Lapislazuli (RK 2206 P1890080).jpg by Reinhard Kraasch, CC BY-SA 4.0
• petrified wood: Petrified wood 1.jpg by Géry PARENT, CC BY-SA 3.0
• calcite: Calcite-Natroapophyllite-russ-15a.jpg by Robert M. Lavinsky, CC BY-SA 3.0
• galena: Galena with marcasite (GeoDIL number - 983).jpg by Darla Sondrol, CC0
• marble: MarbleUSGOV.jpg by USGS, Public domain
• black tourmaline: Schorl-284731.jpg by Robert M. Lavinsky, CC BY-SA 3.0
• gypsum: Gypsum-137552.jpg by Robert M. Lavinsky, CC BY-SA 3.0
• chalcopyrite: Chalcopyrite-Sphalerite-280327.jpg by Robert M. Lavinsky, CC BY-SA 3.0
• moonstone: Moonstone (iridescent sodic feldspar) 4.jpg by James St. John, CC BY 2.0
• tigers eye: Tiger's eye quartz 4 (23829732706).jpg by James St. John, CC BY 2.0
• carnelian: Carnelian pebbles.jpg by Mauro Cateb, CC BY-SA 3.0
• aventurine: Quartz, aventurine (GeoDIL number - 2517).jpg by Darla Sondrol, CC0

App screens on the home page are from the StoneSort app.