(* - Mineral name not approved by the IMA) (! - New Dana classification number has been added or changed) (? - IMA Discredited Mineral Species Name)
Optics MINERAL Isotropic. Avicennite Isotropic. Calciobetafite Isotropic. Gananite Isotropic. Khamrabaevite Isotropic. Lewisite ! Isotropic. Maghemite Isotropic. Magnesiocoulsonite Isotropic. Manganochromite Isotropic. Metastibnite Isotropic. Murdochite Isotropic. Mushistonite Isotropic. Natrobistantite Isotropic. Qandilite Isotropic. Suessite Isotropic. Tantalaeschynite-(Y) Isotropic. Tausonite Isotropic. Ulvospinel Isotropic. Uranopolycrase Isotropic. Vuorelainenite Isotropic. Zincochromite Isotropic, n=1.3. Methane hydrate-H ! Isotropic, n=1.3. Methane hydrate-I ! Isotropic, n=1.33. Villiaumite Isotropic, n=1.34. Cryolithionite Isotropic, n=1.34. Hieratite Isotropic, n=1.362. Carobbiite Isotropic, n=1.369. Cryptohalite Isotropic, n=1.376. Elpasolite Isotropic, n=1.392. Griceite Isotropic, n=1.43. Meniaylovite ! Isotropic, n=1.43. Opal Isotropic, n=1.43. Ralstonite Isotropic, n=1.43. Yttrocerite * Isotropic, n=1.433. Fluorite Isotropic, n=1.4388. Alum-(Na) Isotropic, n=1.44. Chukhrovite-(Y) Isotropic, n=1.425-1.457. Melanophlogite Isotropic, n=1.425-1.457. Melanophlogite-beta ! Isotropic, n=1.443. Chukhrovite-(Ce) Isotropic, n=1.453. Alum-(K) Isotropic, n=1.455. Sulphohalite Isotropic, n=1.459. Tschermigite Isotropic, n=1.46-1.462. Natrophosphate Isotropic, n=1.47-1.48. Faujasite-Ca ! Isotropic, n=1.47-1.48. Faujasite-Mg ! Isotropic, n=1.47-1.48. Faujasite-Na Isotropic, n=1.475. Frankdicksonite Isotropic, n=1.473-1.482. Paulingite-Ca ! Isotropic, n=1.472-1.484. Paulingite-K Isotropic, n=1.472-1.484. Paulingite-Na ! Isotropic, n=1.47-1.496. Allophane Isotropic, n=1.483. Lonecreekite Isotropic, n=1.483-1.484. Sodalite Isotropic, n=1.485. Evansite Isotropic, n=1.485-1.487. Cristobalite Isotropic, n=1.48-1.495. Nosean Isotropic, n=1.488. Dansite Isotropic, n=1.47-1.51. Imogolite Isotropic, n=1.49. Sylvite Isotropic, n=1.495. Lanmuchangite ! Isotropic, n=1.4961. Hauyne Isotropic, n=1.5. Lechatelierite Isotropic, n=1.5. Nastrophite Isotropic, n=1.5. Rosieresite Isotropic, n=1.502. Ertixiite Isotropic, n=1.504. Nabaphite Isotropic, n=1.504. Tschortnerite ! Isotropic, n=1.5-1.51. Bolivarite Isotropic, n=1.508-1.511. Leucite Isotropic, n=1.51. Tychite Isotropic, n=1.5-1.522. Lazurite Isotropic, n=1.513. Cadwaladerite Isotropic, n=1.514. Northupite Isotropic, n=1.52. Pollucite Isotropic, n=1.523. Pahasapaite Isotropic, n=1.53. Viseite Isotropic, n=1.536. Langbeinite Isotropic, n=1.54. Amber * Isotropic, n=1.53-1.55. Lesukite ! Isotropic, n=1.544. Halite Isotropic, n=1.544. Manganotychite Isotropic, n=1.55. Efremovite Isotropic, n=1.55. Ferrotychite Isotropic, n=1.565. Alumopharmacosiderite Isotropic, n=1.566. Phosphovanadylite ! Isotropic, n=1.568. Yeelimite Isotropic, n=1.5714. Nitrobarite Isotropic, n=1.572. Manganolangbeinite Isotropic, n=1.56-1.6. Gutsevichite ? Isotropic, n=1.56-1.61. Zaratite Isotropic, n=1.54-1.64. Thorogummite Isotropic, n=1.59. Schoenfliesite Isotropic, n=1.593. Georgeite Isotropic, n=1.6. Arsenobismite ? Isotropic, n=1.6. Zunyite Isotropic, n=1.593-1.608. Voltaite Isotropic, n=1.605. Zincovoltaite Isotropic, n=1.6132. Hsianghualite Isotropic, n=1.618. Metaborite Isotropic, n=1.625. Bicchulite Isotropic, n=1.632. Katoite Isotropic, n=1.639. Tombarthite-(Y) Isotropic, n=1.64. Umbozerite Isotropic, n=1.638-1.648. Sakhaite Isotropic, n=1.643. Mayenite Isotropic, n=1.63-1.66. Thorosteenstrupine Isotropic, n=1.63-1.687. Griphite Isotropic, n=1.67. Ferrisymplesite Isotropic, n=1.67. Rondorfite ! Isotropic, n=1.675. Hibschite Isotropic, n=1.68. Panichiite ! Isotropic, n=1.693. Londonite ! Isotropic, n=1.693. Pharmacosiderite Isotropic, n=1.693. Salammoniac Isotropic, n=1.6935. Rhodizite Isotropic, n=1.695. Santabarbaraite ! Isotropic, n=1.63-1.77. Tritomite-(Y) Isotropic, n=1.65-1.757. Tritomite-(Ce) Isotropic, n=1.705. Natropharmacosiderite Isotropic, n=1.705. Wickmanite Isotropic, n=1.708. Wadalite Isotropic, n=1.71. Berzeliite Isotropic, n=1.61-1.82. Partzite Isotropic, n=1.72. Delvauxite Isotropic, n=1.716-1.725. Dzhalindite Isotropic, n=1.725. Rowlandite-(Y) Isotropic, n=1.735. Vismirnovite Isotropic, n=1.736. Sohngeite Isotropic, n=1.728-1.747. Helvite Isotropic, n=1.74. Periclase Isotropic, n=1.734-1.75. Grossular Isotropic, n=1.742-1.745. Genthelvite Isotropic, n=1.73-1.76. Pyrope Isotropic, n=1.755. Arsenolite Isotropic, n=1.755. Natanite Isotropic, n=1.758. Yttrialite-(Y) Isotropic, n=1.72-1.8. Spinel Isotropic, n=1.753-1.771. Danalite Isotropic, n=1.768. Ringwoodite Isotropic, n=1.78. Gadolinite-(Ce) Isotropic, n=1.78. Stibiobetafite Isotropic, n=1.78-1.79. Manganberzeliite Isotropic, n=1.6-1.97. Stibiconite Isotropic, n=1.78-1.8. Manganbelyankinite Isotropic, n=1.8. Cesstibtantite Isotropic, n=1.8. Hercynite Isotropic, n=1.8. Majorite Isotropic, n=1.8. Spessartine Isotropic, n=1.8. Yafsoanite Isotropic, n=1.803. Knorringite Isotropic, n=1.82. Gahnite Isotropic, n=1.83. Almandine Isotropic, n=1.83. Liandratite Isotropic, n=1.83-1.835. Yttropyrochlore-(Y) Isotropic, n=1.821-1.855. Goldmanite Isotropic, n=1.838. Lime Isotropic, n=1.822-1.855. Yamatoite ! Isotropic, n=1.85. Haleniusite-(La) ! Isotropic, n=1.83-1.87. Romeite Isotropic, n=1.84-1.87. Bindheimite Isotropic, n=1.86. Uvarovite Isotropic, n=1.872. Calderite Isotropic, n=1.87-1.89. Andradite Isotropic, n=1.9. Alumotungstite Isotropic, n=1.9. Asselbornite Isotropic, n=1.923. Galaxite Isotropic, n=1.93. Nantokite Isotropic, n=1.931-1.935. Polyakovite-(Ce) ! Isotropic, n=1.94. Kimzeyite Isotropic, n=1.94. Schaferite ! Isotropic, n=1.95. Stetefeldtite Isotropic, n=1.93-1.99. Kalipyrochlore Isotropic, n=1.94-1.98. Schorlomite Isotropic, n=1.965. Palenzonaite Isotropic, n=1.97. Uranmicrolite Isotropic, n=1.97-1.98. Moluranite Isotropic, n=1.98. Magnussonite Isotropic, n=1.93-2.03. Menezesite ! Isotropic, n=1.98. Uranpyrochlore Isotropic, n=1.95-2.02. Plumbomicrolite Isotropic, n=1.995. Morimotoite Isotropic, n=2. Bismutomicrolite Isotropic, n=2. Fergusonite-beta-(Nd) Isotropic, n=2. Kadyrelite Isotropic, n=2. Stibiomicrolite Isotropic, n=2.01. Mcalpineite Isotropic, n=2.03. Fluornatromicrolite ! Isotropic, n=2.04. Choloalite Isotropic, n=2.05. Boleite Isotropic, n=2.05. Eulytite Isotropic, n=2-2.1. Nabiasite ! Isotropic, n=1.9-2.2. Pyrochlore Isotropic, n=1.91-2.197. Betafite Isotropic, n=2.06. Monimolite Isotropic, n=2.06. Mosesite Isotropic, n=2.07. Chlorargyrite Isotropic, n=2.08. Plumbopyrochlore Isotropic, n=2.08. Stannomicrolite Isotropic, n=2.08. Strontiopyrochlore * Isotropic, n=2.085. Gianellaite Isotropic, n=2.087. Senarmontite Isotropic, n=2.07-2.11. Bariopyrochlore Isotropic, n=2.09. Bismutostibiconite Isotropic, n=2.1. Bismutopyrochlore ! Isotropic, n=2-2.2. Microlite Isotropic, n=2.1. Samarskite-(Yb) ! Isotropic, n=2.1. Thorutite Isotropic, n=2.08-2.16. Chromite Isotropic, n=2.05-2.19. Fergusonite-(Y) Isotropic, n=2.09-2.15. Ferritungstite Isotropic, n=2.05-2.19. Formanite-(Y) Isotropic, n=2.11-2.13. Murataite Isotropic, n=2.12-2.15. Yttrocrasite-(Y) Isotropic, n=2.137. Oldhamite Isotropic, n=2.142. Aeschynite-(Y) Isotropic, n=2.15. Embolite * Isotropic, n=2.15. Yttrotantalite-(Y) Isotropic, n=2.06-2.24. Euxenite-(Y) Isotropic, n=2.155. Fergusonite-beta-(Ce) Isotropic, n=2.16. Blakeite Isotropic, n=2.16-2.17. Manganosite Isotropic, n=2.17. Walfordite ! Isotropic, n=2.19. Zirkelite Isotropic, n=2.192. Bideauxite Isotropic, n=2.2. Isolueshite ! Isotropic, n=2.2. Miersite Isotropic, n=2.2. Samarskite-(Y) Isotropic, n=2.205. Kobeite-(Y) Isotropic, n=2.22. Zirconolite Isotropic, n=2.23. Bunsenite Isotropic, n=2.23. Kimrobinsonite Isotropic, n=2.24. Elsmoreite ! Isotropic, n=2.25. Bromargyrite Isotropic, n=2.25. Polycrase-(Y) Isotropic, n=2.26. Aeschynite-(Ce) Isotropic, n=2.26. Nioboaeschynite-(Ce) Isotropic, n=2.264. Lafossaite ! Isotropic, n=2.23-2.3. Brannerite Isotropic, n=2.2-2.35. Thorianite Isotropic, n=2.262-2.315. Jixianite Isotropic, n=2.2-2.4. Aeschynite-(Nd) Isotropic, n=2.3. Davidite-(La) Isotropic, n=2.3. Jacobsite Isotropic, n=2.26-2.38. Loparite-(Ce) Isotropic, n=2.328. Orthobrannerite Isotropic, n=2.34. Winstanleyite Isotropic, n=2.346. Marshite Isotropic, n=2.35. Tazheranite Isotropic, n=2.36. Franklinite Isotropic, n=2.38. Magnesioferrite Isotropic, n=2.37-2.43. Sphalerite Isotropic, n=2.4175-2.4178. Diamond Isotropic, n=2.42. Magnetite Isotropic, n=2.49. Eglestonite Isotropic, n=2.5. Corderoite Isotropic, n=2.5. Sillenite Isotropic, n=2.5. Stilleite Isotropic, n=2.69. Hauerite Isotropic, n=2.7. Alabandite Isotropic, n=2.72. Tennantite Isotropic, n=2.72. Tetrahedrite Isotropic, n=2.85. Cuprite