/summon villager ~ ~ ~ {VillagerData:{profession:armorer,level:2,type:desert},PersistenceRequired:1,CustomName:"\"Miner\"",Offers:{Recipes:[{buy:{id:emerald,Count:1},sell:{id:lapis_lazuli,Count:4},maxUses:16},{buy:{id:emerald_block,Count:1},sell:{id:lapis_block,Count:1},maxUses:16},{buy:{id:emerald,Count:1},sell:{id:lapis_ore,Count:1},maxUses:16}]}}