> For the complete documentation index, see [llms.txt](https://doc.cryptostone.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.cryptostone.org/rarity-and-collection/32_rarity_tier_structure.md).

# 32 Rarity Tier Structure

CryptoStone interprets Rarity Score as a final tier system.

| Tier      | Rarity Score Range | Interpretation                                             | Position                                                                                        |
| --------- | ------------------ | ---------------------------------------------------------- | ----------------------------------------------------------------------------------------------- |
| Common    | 0 \~ 34            | Mainly ordinary attributes                                 | Most common gemstone group; basic collectibles and refinement material                          |
| Rare      | 35 \~ 50           | Includes some upper attributes                             | Mid-tier collectibles rarer than ordinary mining results                                        |
| Epic      | 51 \~ 74           | Two or more strong attributes or a high score combination  | High-grade gemstone perceived as a meaningful success                                           |
| Legendary | 75 \~ 89           | Three or more strong attributes or an extremely high score | Very rare gemstone and high-value collectible range                                             |
| Genesis   | 90 \~ 100          | Extreme attribute combination and top score                | Highest collectible asset; additional issuance and refinement creation should be highly limited |

Genesis Tier is not determined by a single attribute alone. It should be interpreted as the top tier reachable only when very low-probability Weight, Color, Clarity, and Cut combinations interact with pool-specific supply adjustment.

Rarity is unified into five final tiers: Common, Rare, Epic, Legendary, and Genesis. Any rarity-like wording used in individual attribute explanations should ultimately be interpreted within this five-tier final Gem NFT system. Separate Mythic, Ancient, or Uncommon final tiers are not used.


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