You have most likely downloaded a pack that changes ores to be more visible, whether that be ore borders, making the ores a full texture of the ore, putting the item texture on the block, or straight-up x-ray hacks. But have you ever thought about making them harder to see?

Introducing obtrusive ores: The pack that makes ores harder to see yet still keeps their general shape. All ores have had their 'chunks' sized down and minimized, and ancient debris has some netherrack surrounding the edges.