There are subtle internal differences that gemologists use to distinguish them:

Growth Patterns: Natural diamonds typically grow in eight-sided octahedral patterns.

Lab-grown diamonds, depending on the method, may exhibit different patterns:

HPHT (High Pressure High Temperature): Often shows a combination of cubic and octahedral faces, resulting in a cross-shaped growth pattern.

CVD (Chemical Vapor Deposition): Grows layer-by-layer, sometimes creating a "stack of pancakes" appearance under specialized equipment.

Inclusions: Lab-grown diamonds may contain specific metallic inclusions from the manufacturing flux (HPHT) or small dark particles (CVD) that differ from the mineral inclusions found in natural diamonds.

Trace Elements: Most natural diamonds contain trace amounts of nitrogen, which is often absent in lab-grown diamonds.

KR, try to be a little more precise when displaying your erroneous compendium of vast ignorance.