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Spheres - Pure Materials

  • A small sample of pure germanium

    Single-Crystal Germanium Sphere - 25 to 100 mm Diameter

    These are single-crystal germanium spheres machined from optical-grade germanium boules.  The CNC machining technique used assures that the polish is uniform around the sphere, not subject to the effects of the crystal orientation that may appear...

    $6,200.00
  • The "New Kilogram" silicon sphere.

    Single-Crystal Silicon Sphere - 25 to 100 mm Diameter

    These are single-crystal silicon spheres machined from optical-grade silicon boules.  The CNC machining technique used assures that the polish is uniform around the sphere, not subject to the effects of the crystal orientation that may appear during...

    $7,500.00