Was Crocodile stronger at Marineford? Or was he holding back in Alabasta?

 During the Alabasta arc, Crocodile displayed a level of power that was initially considered overwhelming by the Straw Hat Pirates. He possessed the Logia-type Devil Fruit called the Suna Suna no Mi (Sand-Sand Fruit), which granted him the ability to control and transform into sand. He had a reputation as a Shichibukai and controlled the desert kingdom of Alabasta from the shadows. His strength was showcased through his battles with Luffy and others. At Marineford, Crocodile was present as part of the war that took place at Marine Headquarters. While he did participate in the battle, he didn't display the same level of dominance as some other powerful characters present. This has led fans to speculate that he might not have been as strong as initially portrayed in Alabasta. It's important to note that power scaling and character abilities can be subject to interpretation and development by the author. Oda often keeps details deliberately open-ended to keep the story intriguing.

Where can I find marble and granite slabs in the US?

 There are many places where you can find marble and granite slabs in the United States. Some options include:

Stone yards: These are specialized businesses that import and distribute a variety of natural stone products, including marble and granite slabs. You can search online for stone yards in your area or look for ads in local home improvement or design magazines.

Home improvement stores: Some larger home improvement stores, such as Home Depot and Lowe's, carry a selection of marble and granite slabs. These may be limited in terms of the styles and colors available, but they can be a convenient option if you are looking for a small quantity of material.

Kitchen and bath showrooms: Many kitchen and bath showrooms carry a wide range of marble and granite slabs, as well as other types of natural stone. These showrooms often have a selection of pre-cut countertops and backsplashes, as well as larger slabs that can be customized to your specific needs.

Online retailers: There are also many online retailers that specialize in natural stone products, including marble and granite slabs. These companies typically have a wide range of styles and colors to choose from and can often provide nationwide delivery.

It is a good idea to shop around and compare prices and selection at different retailers to find the best deal on marble and granite slabs. You may also want to consider factors such as the quality of the material, the reputation of the retailer, and the level of customer service they provide.