{
  "tiers": [
    {
      "trades": [ // tier 1
        {
          "wants": [
            {
              "item": "minecraft:clay_ball",
              "quantity": {
                "min": 10,
                "max": 13
              }
            }
          ],
          "gives": [
            {
              "item": "minecraft:emerald"
            }
          ]
        },
        {
          "wants": [
            {
              "item": "minecraft:emerald",
              "quantity": {
                "min": 1,
                "max": 2
              }
            }
          ],
          "gives": [
            {
              "item": "minecraft:brick",
              "quantity": {
                "min": 16,
                "max": 16
              }
            }
          ]
        }
      ]
    },
    {
      "trades":[ // tier 2
      {
        "wants": [
          {
            "item": "minecraft:stone:0",
            "quantity": {
              "min": 20,
              "max": 26
            }
          }
        ],
        "gives": [
          {
            "item": "minecraft:emerald"
          }
        ]
      },
      {
        "wants": [
          {
            "item": "minecraft:emerald",
            "quantity": {
              "min": 1,
              "max": 2
            }
          }
        ],
        "gives": [
          {
            "item": "minecraft:stonebrick:3",
            "quantity": {
              "min": 4,
              "max": 4
            }
          }
        ]
      }
      ]
    },
    {
      "trades": [ // tier 3
        {
          "wants": [
            {
              "item": "minecraft:stone:1",
              "quantity": {
                "min": 16,
                "max": 21
              }
            }
          ],
          "gives": [
            {
              "item": "minecraft:emerald"
            }
          ]
        },
        {
          "wants": [
            {
              "item": "minecraft:stone:5",
              "quantity": {
                "min": 16,
                "max": 21
              }
            }
          ],
          "gives": [
            {
              "item": "minecraft:emerald"
            }
          ]
        },
        {
          "wants": [
            {
              "item": "minecraft:stone:3",
              "quantity": {
                "min": 16,
                "max": 21
              }
            }
          ],
          "gives": [
            {
              "item": "minecraft:emerald"
            }
          ]
        },
        {
          "wants": [
            {
              "item": "minecraft:emerald",
              "quantity": {
                "min": 1,
                "max": 2
              }
            }
          ],
          "gives": [
            {
              "item": "minecraft:stone:2",
              "quantity": {
                "min": 4,
                "max": 4
              }
            }
          ]
        },
        {
          "wants": [
            {
              "item": "minecraft:emerald",
              "quantity": {
                "min": 1,
                "max": 2
              }
            }
          ],
          "gives": [
            {
              "item": "minecraft:stone:6",
              "quantity": {
                "min": 4,
                "max": 4
              }
            }
          ]
        },
        {
          "wants": [
            {
              "item": "minecraft:emerald",
              "quantity": {
                "min": 1,
                "max": 2
              }
            }
          ],
          "gives": [
            {
              "item": "minecraft:stone:4",
              "quantity": {
                "min": 4,
                "max": 4
              }
            }
          ]
        }
      ]
    },
    {
      "trades": [ // tier 4
        {
          "wants": [
            {
              "item": "minecraft:quartz",
              "quantity": {
                "min": 20,
                "max": 26
              }
            }
          ],
          "gives": [
            {
              "item": "minecraft:emerald"
            }
          ]
        }
      ]
    },
    {
      "trades": [ // tier 5
        {
          "wants": [
            {
              "item": "minecraft:emerald",
              "quantity": {
                "min": 1,
                "max": 2
              }
            }
          ],
          "gives": [
            {
              "item": "minecraft:quartz_block:2"
            }
          ]
        }
      ]
    }
  ]
}