This FORGE mod adds some gemstones, equipment, two pedestals, 16 coloured redstone lamps, some wearable cosmetics as well as a few decorative blocks. (See screenshots)

Since 1.2.4.0 you can wear the cosmetics as Curios, if it's installed: https://www.curseforge.com/minecraft/mc-mods/curios

Gems are tiered between vanilla Iron and Diamond as follows:
Iron

Tanzanite
Topaz
Sapphire
Pink Sapphire
Ruby

Diamond

By default ores generate in the overworld (except Pink Sapphires which generate in the Nether) according to vanilla datapack-style settings.

Gem glass has explosion resistance, half of that of obsidian, except for diamond which is equal and ruby which is slightly weaker. Same for light emitting variants.

Lamp post caps allow lanterns to be hung from the "arm" end, the caps fit well on top of vanilla fences, but can also be put as if sticking out of a block by holding Sneak when placing.

Install ConnectedTexturesMod if you want connected textures! https://www.curseforge.com/minecraft/mc-mods/ctm

FAQ

Q: Forge?
A: Forge.

Q: Can I include your mod in a video?

A: As long as you include a link to the mod/modpack (if it happens to be in one), absolutely

If anyone wants an easier way to chat or ask questions here's a Discord link: https://discord.gg/sKwS3c62uM

Gemspark

1.2.6.5

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