Custom Marble and Onyx

Custom Marble and Onyx is a leading distributor of premium natural stone surfaces, based in Modesto, California. For nearly 30 years, we’ve been dedicated to providing exceptional quality materials and expert service to contractors, developers, and homeowners. We specialize in sourcing and supplying a wide range of beautiful options, including Green Mountain Soapstone, Silestone, Cambria, Caesarstone, and Polarstone, alongside cultured marble, granite, quartz, and solid surfaces. Our commitment to local operations and direct supply ensures competitive pricing and reliable delivery. Custom Marble and Onyx is a trusted name, built on a foundation of quality and customer satisfaction.

We cater to a diverse clientele, assisting with projects ranging from kitchen and bathroom countertops and islands to luxurious showers and specialty installations. Our friendly and artistically-oriented staff works closely with each client to bring their vision to life, offering free estimates and professional installation.

Green Mountain Soapstone is a cornerstone of our offerings, and we pride ourselves on being the largest distributor of this unique material in California. We also provide a comprehensive selection of other premium brands, ensuring there’s a perfect fit for every project and aesthetic.