[
{"id": "agate", "name": "Agate", "family": "quartz", "hardness": null, "specific_gravity": null, "refractive_index": null, "colour": "many", "description": "Chalcedony with many coloured bands", "related": ["chalcedony", "onyx"], "findings_count": 81},
{"id": "amber", "name": "Amber", "family": "fossil", "hardness": null, "specific_gravity": null, "refractive_index": null, "colour": "yellow,brown", "description": "Fossil resin", "related": [], "findings_count": 0},
{"id": "amethyst", "name": "Amethyst", "family": "quartz", "hardness": null, "specific_gravity": null, "refractive_index": null, "colour": "purple", "description": "Purple quartz", "related": [], "findings_count": 51},
{"id": "aquamarine", "name": "Aquamarine", "family": "quartz", "hardness": null, "specific_gravity": null, "refractive_index": null, "colour": null, "description": "BLUE QUARTZ", "related": [], "findings_count": 2},
{"id": "azurite", "name": "Azurite", "family": "copper", "hardness": null, "specific_gravity": null, "refractive_index": null, "colour": "blue", "description": "Blue copper carbonate", "related": ["malachite"], "findings_count": 23},
{"id": "beryl", "name": "Beryl", "family": "beryl", "hardness": 8.0, "specific_gravity": 2.7, "refractive_index": 1.58, "colour": "various", "description": "Transparent forms include emerald", "related": ["emerald", "aquamarine"], "findings_count": 41},
{"id": "chalcedony", "name": "Chalcedony", "family": "quartz", "hardness": 6.0, "specific_gravity": 2.6, "refractive_index": 1.57, "colour": "various", "description": "Translucent quartz", "related": ["agate"], "findings_count": 0},
{"id": "chrysoprase", "name": "Chrysoprase", "family": "quartz", "hardness": null, "specific_gravity": null, "refractive_index": null, "colour": "green", "description": "Green chalcedony", "related": ["agate"], "findings_count": 8},
{"id": "citrine", "name": "Citrine", "family": null, "hardness": null, "specific_gravity": null, "refractive_index": null, "colour": null, "description": "YELLOW QUARTZ", "related": [], "findings_count": 15},
{"id": "corundum", "name": "Corundum", "family": "corundum", "hardness": 9.0, "specific_gravity": null, "refractive_index": 1.76, "colour": "various", "description": "Very hard mineral - includes sapphire", "related": ["ruby", "sapphire"], "findings_count": 0},
{"id": "diamond", "name": "Diamond", "family": "diamond", "hardness": 10.0, "specific_gravity": null, "refractive_index": 2.42, "colour": "clear+", "description": "Hardest mineral, can be dull when uncut", "related": [], "findings_count": 35},
{"id": "emerald", "name": "Emerald", "family": "corundum", "hardness": null, "specific_gravity": null, "refractive_index": null, "colour": null, "description": null, "related": [], "findings_count": 12},
{"id": "garnet", "name": "Garnet", "family": "silicates", "hardness": 7.0, "specific_gravity": 4.0, "refractive_index": 1.8, "colour": "various", "description": "Many attractive colours, all basedon SiO4", "related": [], "findings_count": 45},
{"id": "geodes", "name": "Geodes", "family": "quartz", "hardness": null, "specific_gravity": null, "refractive_index": null, "colour": "various", "description": "chalcedony sphere with crystallinecavity", "related": [], "findings_count": 0},
{"id": "gold", "name": "Gold", "family": null, "hardness": null, "specific_gravity": null, "refractive_index": null, "colour": "yellow", "description": "Gold", "related": [], "findings_count": 6},
{"id": "hematite", "name": "Hematite", "family": null, "hardness": null, "specific_gravity": null, "refractive_index": null, "colour": null, "description": null, "related": [], "findings_count": 4},
{"id": "jade", "name": "Jade", "family": "amphibole", "hardness": 6.0, "specific_gravity": 3.1, "refractive_index": null, "colour": "green", "description": "Green translucent to opaque", "related": [], "findings_count": 6},
{"id": "jasper", "name": "Jasper", "family": "quartz", "hardness": 7.0, "specific_gravity": 2.6, "refractive_index": 1.54, "colour": "red,brown,green", "description": "Usually red transluscent quartz", "related": ["chalcedony"], "findings_count": 27},
{"id": "malachite", "name": "Malachite", "family": "copper", "hardness": 4.0, "specific_gravity": 4.0, "refractive_index": 1.8, "colour": "green", "description": "Green copper carbonate", "related": ["azurite"], "findings_count": 11},
{"id": "obsidian", "name": "Obsidian", "family": "glass", "hardness": 5.0, "specific_gravity": 2.4, "refractive_index": 1.5, "colour": "black,brown,red", "description": "Natural glass", "related": ["pitchstone"], "findings_count": 1},
{"id": "opal", "name": "Opal", "family": "quartz", "hardness": 6.0, "specific_gravity": 2.0, "refractive_index": 1.45, "colour": "various", "description": "Play of colours", "related": [], "findings_count": 29},
{"id": "opal_common", "name": "Common Opal", "family": null, "hardness": null, "specific_gravity": null, "refractive_index": null, "colour": null, "description": null, "related": [], "findings_count": 35},
{"id": "petrified_wood", "name": "Petrified Wood", "family": "fossil", "hardness": null, "specific_gravity": null, "refractive_index": null, "colour": null, "description": "Petrified wood!", "related": [], "findings_count": 11},
{"id": "pyrite", "name": "Pyrite", "family": "sulphide", "hardness": 6.0, "specific_gravity": 5.0, "refractive_index": null, "colour": "yellow", "description": "Iron pyrites/ fools gold", "related": [], "findings_count": 6},
{"id": "quartz", "name": "Quartz", "family": "quartz", "hardness": 7.0, "specific_gravity": 2.65, "refractive_index": 1.55, "colour": "clear, various", "description": "Variety of forms", "related": ["amethyst", "citrine", "smoky"], "findings_count": 17},
{"id": "ruby", "name": "Ruby", "family": "corundum", "hardness": null, "specific_gravity": null, "refractive_index": null, "colour": "red", "description": "Red corundum", "related": ["sapphire"], "findings_count": 12},
{"id": "sapphire", "name": "Sapphire", "family": "corundum", "hardness": null, "specific_gravity": null, "refractive_index": null, "colour": "clear", "description": "Clear corundum", "related": ["ruby"], "findings_count": 42},
{"id": "serpentine", "name": "Serpentine", "family": null, "hardness": null, "specific_gravity": null, "refractive_index": null, "colour": null, "description": null, "related": [], "findings_count": 2},
{"id": "thunder_egg", "name": "Thunder Egg", "family": null, "hardness": null, "specific_gravity": null, "refractive_index": null, "colour": null, "description": null, "related": [], "findings_count": 10},
{"id": "tiger_eye", "name": "Tiger Eye", "family": "silicates", "hardness": 4.0, "specific_gravity": null, "refractive_index": null, "colour": null, "description": "banded blue asbestos (crocodilite)", "related": [], "findings_count": 4},
{"id": "topaz", "name": "Topaz", "family": "silicates", "hardness": 8.0, "specific_gravity": 3.5, "refractive_index": 1.62, "colour": "various", "description": "Prismatic crystals in variety of colours", "related": [], "findings_count": 56},
{"id": "tourmaline", "name": "Tourmaline", "family": "silicates", "hardness": 7.0, "specific_gravity": 3.2, "refractive_index": 1.61, "colour": "various", "description": "Trigonal prisms in a variety of colours", "related": [], "findings_count": 0},
{"id": "turquoise", "name": "Turquoise", "family": "phosphates", "hardness": 6.0, "specific_gravity": 2.6, "refractive_index": null, "colour": "blue, green", "description": "Sky blue or green", "related": [], "findings_count": 5},
{"id": "zircon", "name": "Zircon", "family": "silicates", "hardness": 7.0, "specific_gravity": 4.6, "refractive_index": 2.0, "colour": "clear, various", "description": "Tetragonal prisms showing great brilliance", "related": [], "findings_count": 37}
]