Follow the nine steps, grading your mineral from one to ten.
If a step is not applicable to your sample, skip that step. The calculator will average out your score.

Step 1/9

Color: Vivid color is the most desirable. Too light or too dark is not ideal.

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Too light or too dark Vivid

Transparency: Little to no impurities or inclusions make the crystal more desirable.

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Visible impurities and inclusions Clear and clean

Luster: Does the crystal sparkle? A glassy, shiny look is ideal.

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Dull, no sparkle Glassy sparkle, shiny luster

Form & Definition: Symmetry, well-defined terminations, and clean isolated crystals are prized. The specific crystal specimen will dictate a lot.

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Irregular, poor definition Symmetrical, crisp crystal

Crystal Size: Size alone is not the most desirable aspect. It must also be a top-quality crystal to be ideal.

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Small and blemished Large and perfect

Contrast: A clear distinction between the crystal and the matrix is prized. A matrix that clearly frames the crystal is ideal.

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A muddled mix Beautifully framed crystal

Balance: Focuses on the overall harmony of the specimen. Do the crystals and the matrix complement each other?

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One overpowers the other Harmonious relationship

Aesthetics: An arresting focal point is most desirable. Clean lines with a clear intelligible shape are prized.

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Messy display Sharp focal point

Perfection: No visible damage to either the matrix or the crystal is ideal.

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Chips and missing pieces Zero damage
1
Average Score
  • Exceptional Quality
  • Very Good Quality
  • Good Quality
  • Not of Collectible Quality

The Wilensky Approach

Your Results
According to your selection, your mineral's grade is 7.5 which is good quality

Section A: The quality of the crystal

Color: Vivid color is the most desirable. Too light or too dark is not ideal.
Transparency: Little to no impurities or inclusions make the crystal more desirable.
NA
Luster: Does the crystal sparkle? A glassy, shiny look is ideal.
1
Form and Definition: Symmetry, well-defined terminations, and clean isolated crystals are prized. The specific crystal specimen will dictate a lot.
2
Crystal Size: Size alone is not the most desirable aspect. It must also be a top-quality crystal to be ideal.

Section B: Focuses on the quality and relationship between both the crystal and the matrix.

Contrast: A clear distinction between the crystal and the matrix is prized. A matrix that clearly frames the crystal is ideal.
NA
Balance: The overall harmony of the specimen. Do the crystal and the matrix complement each other?
2
Aesthetics: An arresting focal point is most desirable. Clean lines with a clear intelligible shape are prized.
2
Perfection: No visible damage to either the matrix or the crystal is ideal.
1