Al₂O₃
Structural Ceramic
Alumina
Alumina
Al₂O₃Aluminum Oxide (Alumina)
Image kind
Real photo
Credit: SSMG-ITALY / CC BY-SA 3.0 (modified) · source
Rubies and sapphires are both alumina (Al₂O₃) — the only difference is trace impurities. Add 1% chromium and you get a red ruby; add iron and titanium and you get a blue sapphire.
Jungian Type: Type 10
Personality tendencies across 4 dimensions
内向 (I)60%外向 (E)
50
直観 (N)62%感覚 (S)
50
感情 (F)41%思考 (T)
50
知覚 (P)56%判断 (J)
50
Enneagram Detailed Scores
Score distribution across 9 types
Big Five Personality Traits
Personality analysis based on the 5-factor model
Alloy Characteristics
Personality traits from metal physical properties
💰Price & Economic Data
Market price and economic characteristics (as of 2026-02)
Unit Price (est.)
$0.5
per kg
Price Range
0.3-0.6 USD/kg
Market Trends & Notes
セラミックの代表格。豊富で安価。高純度品は高価。宝石用途では別格の価値。
🎨Element Colors
Scientific basis of Alumina's colors
Colors of this element
白色
#FFFFFF
青色（サファイア）
#0F52BA
赤色（ルビー）
#E0115F
💑Compatible Materials
Materials with good metallurgical and personality compatibility
Career Interests & Suggestions
Based on Holland Code: RCI
1st R - Realistic
2nd C - Conventional
3rd I - Investigative
1Ceramic Materials Engineer / Sintering Technician
2Quality Control / Quality Assurance Manager
3Materials Science Researcher / Crystal Engineering
4Precision Machining Technician / Polishing Specialist
5Electronic Substrate Design Engineer
6Gemologist / Mineralogist
Based on RIASEC (Holland Code) vocational interest model. These are illustrative suggestions derived from the character's personality profile.