Hi. I hope the counter is thick enough to take the weight of the sink and water. atleast 25mm to drill in the undermount sink clips. Drill clips are available easy, you can look up Blanco and Franke EL undermount clips. If the counter is thin, you risk cracking while drilling, in which case it is better to use epoxy sink clips. A brand you can find in India is Solartime. They are expensive but you can get your local fabricator to make you a dozen clips and get them galvanised to prevent rusting. Do remember to apply silicone sealant between the undermount sink and the quartz generously. I know how you feel, things that are easily done in the west can be a pain to achieve in our country, especially places other than major cities.

Ankita, What are your deciding criteria. Stainless Steel, FRP, Quartz, Granite are some of the options. SS is used most commonly. Thanks Nitin.Cornerstone Designs.

Kavita, You may be in luck, there is a quick and easy fix for the eyesore. Look for a product called Self adhesive caulking tape. But please get a decent professional to install it this time. They save such issues. Thanks, Nitin Cornerstone Designs, Bangalore

For a cohesive look, it's recommended to use the same Onyx color/pattern for both the vanity counter/sink and the shower walls. However, incorporating complementary colors can add visual interest and depth to the bathroom design. Consider using similar tones or coordinating patterns to achieve a harmonious yet dynamic aesthetic.