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The frequency for sealing granite countertops depends on several factors, including the type of sealant used, the color of the granite, and how heavily the countertops are used. As a general guideline, resealing is often recommended every 12 to 18 months, but some sources suggest it could be as often as every few months or at least once a year.

The type of sealant is a major factor: water-based sealants may need reapplication every six months to a year, while more durable solvent-based sealants can last for five to 10 years. Additionally, factors like heavy kitchen traffic, frequent use of acidic cleaners, and lighter granite colors may require more frequent sealing to prevent staining.

To determine if your countertops need resealing, you can perform a simple water test. Place a few drops of water or a wet paper towel on an inconspicuous area of the granite. After 10 to 15 minutes, check the spot. If the water has beaded up, the seal is still intact. If the water has been absorbed and darkened the stone, it's time to apply a new coat of sealant. You can choose to seal the granite yourself or hire a professional to ensure it's done correctly.

It all comes down to rarity and demand. Granite rocks with unique patterns or rare colorways like red, purple, and blue are more expensive than traditional designs. Some types of blue granite are extremely rare, like Azul Aran and Blue Bahia, driving the price up even further. The most expensive type of all is a unique design called Van Gogh granite. As the name suggests, it sort of looks like a painting. 

Recycled glass countertops can last between 10 and 20 years with regular care and maintenance. The exact lifespan depends on the binding agent used; acrylic is a highly durable choice, while concrete may shorten the countertop's life. Because the material is non-porous, it is heat-resistant, stain-resistant, and easy to clean, allowing it to withstand the rigors of a modern kitchen without showing significant wear and tear for over a decade.

There are several countertop options available to fit your lifestyle and needs. 

• Granite countertops are durable and come in a variety of colors.

• Soapstone countertops are prone to scratches and best in smaller kitchens.

• Marble countertops are less durable than granite but a good option for busy kitchens.

• Slate countertops are stain-resistant, making them easy to clean.

• Limestone countertops must be sealed often to prevent scratches.

• Acrylic countertops cost less than granite while still providing durability.

• Laminate countertops are the most affordable but chip and fade faster.

• Wood countertops need monthly sealing to maintain.