Enhancers are one of two blocks:
Calvinite Enhancer and Sylvanite Enhancer,
used to increase the tier of Mineral Soil to Tier 2 and
Tier 3 respectively.
Without Enhancers, a Mineral Soil block can only
reach a Mineral Concentration of
Enhancers, the Mineral Concentration can be
60% with Calvinite and
75% with Sylvanite.
Editing config files allows a Mineral Content of
100% to be achieved through
Enhancers - though this is NOT the default behaviour.
Enhancer blocks are only available in
1.14.4 Resynth Versions and newer.