Add to Cart GeS Crystal Germanium Sulfide MSRP: Now: $580.00 Was: Germanium sulfide (GeS) is an innovative anisotropic semiconductor with a distinctive van der Waals (vdW) structure, detailed in our product description. GeS vdW crystals are synthesized via a... BLK-GeS MSRP: Now: $580.00 Was: Add to Cart Qty in Cart: 0 Quantity: Decrease Quantity: Increase Quantity: Price: MSRP: Now: $580.00 Was: Subtotal: Add to Cart