Weight: A single pendant without a necklace is approximately 48 - 50 grams (with errors).
There is no difference between single qubits; only the printed formulas are different.
Everyone can purchase according to their own preferences.
About the Formulas
Qubit 1 — Lagrangian of Quantum Chromodynamics
Qubit 2 — Time - Dependent Schrödinger Equation
Qubit 3 — Schrödinger Equation with Position - Dependent Potential
Qubit 4 — Supersymmetry Equation
Qubit 5 — Position - Space Schrödinger Equation
Qubit 6 — Ginzburg - Landau Equation (Superconductivity