{
  "type": "gems:add_item",
  "conditions": [
    {
      "condition": "forge:loot_table_id",
      "loot_table_id": "minecraft:chests/abandoned_mineshaft"
    }
  ],
  "item": "gems:ruby_shards",
  "maxItems": 1,
  "minItems": 1,
  "probability": 0.1
}