Mineral Identification

Calcium
1000-1200 mg/day - bones, teeth, muscle contraction
Iron
8 mg/day (men), 18 mg/day (women) - oxygen transport
Magnesium
400-420 mg/day (men), 310-320 mg/day (women) - 300+ enzymes
Zinc
11 mg/day (men), 8 mg/day (women) - immune, wound healing
Potassium
2600-3400 mg/day - blood pressure, fluid balance
Sodium
<2300 mg/day recommended - nerve/muscle function
Phosphorus
700 mg/day - bones, energy metabolism
Selenium
55 mcg/day - antioxidant, thyroid function
Copper
900 mcg/day - iron metabolism, connective tissue
Manganese
2.3 mg/day (men), 1.8 mg/day (women) - bone, metabolism
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About Mineral ID

What this tool does

Jewelry tools convert between carats, grams, and millimeters, determine ring sizes across international standards, calculate gold purity (karat to fineness), evaluate the 4Cs of diamonds, and estimate metal density for casting.

Why use this tool

Jewelers and buyers need precise conversions. Knowing the exact gram weight of a 1.5-carat diamond, or the gold content in 18K vs. 14K, informs pricing and design decisions. These tools provide instant, accurate answers.

How it works

Carat-to-gram conversion uses the fixed ratio 1 ct = 0.2 g. Ring-size conversion maps circumference in mm to lettered or numbered systems (US, UK, EU, JP). Gold karat to fineness divides by 24 (18K = 75% gold).

Pro tip

Ring size varies with temperature and time of day. For the most accurate measurement, size the finger in the afternoon when hands are warmest and slightly swollen, not first thing in the morning.

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