Mekanism adds Refined Glowstone and Refined Obsidian, but specifically I think Osmium would be a good candidate for a tool material. It's an early-game available material that doesn't have many uses until later, except that it has good durability for tools and armor.

Did you make a configuration for it by chance?

One of these...

    {
      "name": "wood",
      "harvestLevel": 0,
      "maxUses": 59,
      "efficiency": 2.0,
      "damage": 0.0,
      "enchantability": 15,
      "color": "73523e",
      "shiny": false,
      "ingredient": "ore:plankWood",
      "langKey": "material.athenaeum.wood",
      "oreDictKey": "artisansToolWood"
    },

I can probably look into that comparing it to iron properties.

Ah, here you go:

{
    "name": "osmium",
    "harvestLevel": 2,
    "maxUses": 500,
    "efficiency": 10.0,
    "damage": 4.0,
    "enchantability": 12,
    "color": "9BA9B1",
    "shiny": true,
    "ingredient": "ore:ingotOsmium",
    "langKey": "material.athenaeum.osmium",
    "oreDictKey": "artisansToolOsmium"
},