There isn't one single mineral that's *exactly* like quartz, as quartz has a unique combination of properties. However, here are some minerals that share some similarities with quartz and might be considered "most like" it, depending on the specific characteristic you're focusing on:

For Hardness and Durability:

* Topaz: Topaz is slightly harder than quartz (8 on Mohs scale vs. 7 for quartz). It also has a similar glassy luster and often comes in a variety of colors.

* Corundum: Corundum is much harder than quartz (9 on Mohs scale) and has a similar crystal structure. It's the mineral form of ruby and sapphire.

For Crystalline Structure:

* Feldspar: Feldspars share a similar crystal structure with quartz, although they are chemically different. They are also very common in the Earth's crust.

* Calcite: Calcite has a different crystal structure than quartz, but it shares the property of being easily cleaved (broken along smooth planes).

For Color and Transparency:

* Citrine: Citrine is actually a variety of quartz, but it's often mistaken for topaz due to its yellow color.

* Amethyst: Amethyst is another variety of quartz, known for its purple color.

Ultimately, the best "most like" mineral depends on what aspect of quartz you are comparing. You might find a mineral that shares its hardness, its crystal structure, its color, or some other feature, but there's no single mineral that perfectly matches all of quartz's unique properties.