| JADE (gem variety of both Jadeite and Nephrite (variety of Actinolite)) | |
| JADEITE (Sodium Iron Aluminum Silicate) | |
| JAMESONITE (Lead Iron Antimony Sulfide) | |
| JAROSITE (Potassium Iron Sulfate Hydroxide) | |
| 0 | JASPER (variety of Quartz - Silicon Oxide) |
| JOAQUINITE (Barium Sodium Cesium Titanium Niobium Iron Silicate Hydroxide Fluoride) | |
| JORDANITE (Lead Arsenic Antimony Sulfide) |