Matches in DBpedia 2014 for { ?s <http://dbpedia.org/property/birefringence> ?o. }
- Olivine birefringence "δ = 0.040".
- Omphacite birefringence "δ = 0.023".
- Opal birefringence "none".
- Orpiment birefringence "δ = 0.620".
- Orthoclase birefringence "0.005".
- Osarizawaite birefringence "δ = 0.020".
- Osumilite birefringence "0.004".
- Otwayite birefringence "δ = 0.070".
- Pabstite birefringence "δ = 0.011".
- Panethite birefringence "+0.009".
- Papagoite birefringence "δ = 0.065".
- Paragonite birefringence "δ = 0.036".
- Paralaurionite birefringence "δ = 0.150".
- Pararealgar birefringence "2.02".
- Pargasite birefringence "δ = 0.020 max.".
- Parthéite birefringence "δ = 0.012 - 0.015".
- Pascoite birefringence "δ = 0.050".
- Pearceite birefringence "2.7".
- Pectolite birefringence "δ = 0.037".
- Pentagonite birefringence "δ = 0.014".
- Peridot birefringence "+0.036".
- Petalite birefringence "δ = 0.012".
- Pezzottaite birefringence "-0.008".
- Pharmacolite birefringence "δ = 0.010 - 0.011".
- Phenakite birefringence "δ = 0.017".
- Phillipsite birefringence "δ = 0.003 - 0.009".
- Phlogopite birefringence "δ =0.0280-0.0450".
- Phoenicochroite birefringence "0.27".
- Phosgenite birefringence "δ = 0.027".
- Phosphophyllite birefringence "0.021".
- Pickeringite birefringence "δ = 0.007".
- Picropharmacolite birefringence "δ = 0.009".
- Piemontite birefringence "δ = 0.025 - 0.076".
- Pigeonite birefringence "δ = 0.021 - 0.030".
- Pinalite birefringence "δ = 0.015".
- Pinnoite birefringence "δ = 0.010".
- Piypite birefringence "δ = 0.112".
- Plattnerite birefringence "δ = 0.1".
- Polyhalite birefringence "δ = 0.021".
- Portlandite birefringence "δ = 0.027".
- Poudretteite birefringence "0.021".
- Powellite birefringence "δ = 0.010".
- Prehnite birefringence "δ = 0.021 - 0.033".
- Proustite birefringence "δ = 0.295 - 0.296".
- Pseudobrookite birefringence "δ = 0.070".
- Pseudomalachite birefringence "δ = 0.076".
- Purpurite birefringence "δ = 0.070".
- Pyromorphite birefringence "δ = 0.010".
- Pyrope birefringence "Isotropic, appears black in cross-polarized light".
- Pyrophanite birefringence "δ = 0.271".
- Pyrophyllite birefringence "δ =0.0450-0.0620".
- Pyroxmangite birefringence "δ=0.018".
- Quartz birefringence "+0.009".
- Rapidcreekite birefringence "δ = 0.015".
- Realgar birefringence "δ = 0.166".
- Reinerite birefringence "Maxium δ = 0.080".
- Rhodochrosite birefringence "δ = 0.218".
- Rhodolite birefringence "none".
- Rhodonite birefringence "δ = 0.013".
- Riebeckite birefringence "δ = 0.005 - 0.008".
- Ringwoodite birefringence "none".
- Robertsite birefringence "δ = 0.045".
- Rodalquilarite birefringence "δ = 0.100".
- Rosasite birefringence "δ = 0.139 - 0.143".
- Roscoelite birefringence "δ =".
- Rubicline birefringence "δ = 0.007".
- Ruby birefringence "0.008".
- Ruizite birefringence "δ = 0.071".
- Rutherfordine birefringence "δ = 0.055 - 0.072".
- Rutile birefringence "0.296".
- Sacrofanite birefringence "0.019".
- Sal_ammoniac birefringence "Weak after deformation".
- Saleeite birefringence "δ = 0.027".
- Saliotite birefringence "δ = 0.010".
- Sampleite birefringence "δ = 0.050".
- Samuelsonite birefringence "0.01".
- Sanbornite birefringence "δ = 0.0270".
- Sanidine birefringence "δ = 0.007".
- Saponite birefringence "δ = 0.032 - 0.037".
- Sapphirine birefringence "δ = 0.004 - 0.005".
- Sarkinite birefringence "δ = 0.016".
- Sassolite birefringence "δ = 0.119".
- Satterlyite birefringence "δ = 0.002".
- Scheelite birefringence "δ = 0.017".
- Schoepite birefringence "δ = 0.045".
- Scorzalite birefringence "δ = 0.037".
- Seamanite birefringence "δ = 0.025".
- Searlesite birefringence "δ = 0.019".
- Sekaninaite birefringence "δ = 0.015".
- Selenite_(mineral) birefringence "δ =0.0090-0.0100".
- Sellaite birefringence "δ = 0.012".
- Sepiolite birefringence "δ = 0.010".
- Sewardite birefringence "Weak".
- Shandite birefringence "Strong, dark blue-gray".
- Siderite birefringence "δ = 0.242".
- Siderophyllite birefringence "δ = 0.043".
- Siderotil birefringence "δ = 0.021".
- Simpsonite birefringence "δ = 0.020".
- Sinoite birefringence "δ = 0.115".
- Smithsonite birefringence "δ = 0.223 - 0.227".