It is a ground full of shiny gems. The crystal like patterns can be found on those ruby.It is recommended to mix it with a translucent shader.
Minecraft with RTX PBR Texturing Guide, GeForce News
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TOP 9 website for Free PBR textures - PIXELNIL
Seamless (tileable) Red Small Crystals PBR Texture with eight maps: albedo/diffuse, reflection, glossiness, height/displacement, roughness, metalness,
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Seamless (tileable) Red Crystal PBR Texture with materials for 3ds max (V-Ray), Blender, Unreal Engine, Unity and SBSAR
Red Crystal PBR Texture