Mineral Descriptive Terms Crossword

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Across
  1. 3. Intergrowth of two or more crystals in specific orientations, showing changes in interference colors.
  2. 5. Crystals with well-formed faces, indicating they grew without constraints from surrounding materials.
  3. 8. Crystals with some well-formed faces but not fully developed.
  4. 9. Variations in a crystal’s composition from core to rim, often visible as changes in interference colors or extinction angles.
  5. 10. Large crystals in an igneous rock, surrounded by a finer-grained groundmass.
Down
  1. 1. Crystals lacking well-formed faces due to growth interference.
  2. 2. Extinction Variation in extinction angles within a single crystal due to internal strain.
  3. 4. A property where minerals show different colors or shades when viewed from different angles under polarized light.
  4. 6. The tendency of minerals to break along specific planes related to their atomic structure.
  5. 7. Large crystals found in a metamorphic rock matrix.
  6. 11. The apparent height difference between minerals due to differences in refractive indices.