Stewart Companies

Chesapeake Minerals Tombstone
Fiber Optics
Solar Panels


Chesapeake Minerals uses select grades of quartz gravel supplied by York Building Products Co., Inc.’s adjacent Belvedere plant where more than 10,000 tons of alluvial sand and gravel are processed daily.


Select quartz gravel is crushed, washed and classified into multiple low-iron quartz commodities. Glass sand (40 x 140 US Mesh) is then dried and separated from remaining iron-bearing magnetic minerals to make an ultra-low iron glass sand (Principio White). Following magnetic separation, our glass sand is 99.998% SiO2. A grinding mill will be added to the circuit and commissioned in second quarter of 2022 to produce high purity silica powders to customer specification.


1079 Belvidere Road
Port Deposit, MD 21904


Glass Manufacturing Market

Solar Panel Market

Fiber Optics Market

Industrial Fillers Market

Semiconductor Market