Updated Gemstone Portfolio Tool

Gemstone Portfolio Weight Calculator

Blend value-based and rarity-based weights to see how each gemstone contributes to your overall portfolio allocation and diversification.

Value Weights Rarity Weights Combined Allocation Diversification Score

Build Your Gemstone Portfolio Allocation

Add gemstones with type, carat, quality and value. The calculator assigns a rarity score, computes value weights and rarity weights, and then combines them into a single portfolio allocation for each stone.

% by value

Rarity emphasis is 100% − this value.

# Type Carat Color Clarity Cut Origin Treatment Value Rarity Value wt% Rarity wt% Combined wt%

Use at least two gemstones for a meaningful diversification view. All weights are normalized so that value weights, rarity weights and combined weights each sum to 100% across the portfolio.

Portfolio Insight Summary

Review which gemstones dominate the portfolio by value, rarity and combined allocation, and how the value versus rarity emphasis shapes the overall profile.

Top Holding By Value Weight

No portfolio calculated yet.

Top Holding By Rarity Weight

Rarity-based leader will appear here after calculation.

Top Holding By Combined Weight

Combined allocation leader will appear here after calculation.

Portfolio Style Note

Style and risk profile will appear here based on the latest calculation.

What Gemstone Portfolio Weight Calculator Calculates

Use Gemstone Portfolio Weight Calculator to blend value-based and rarity-based weights to see how each gemstone contributes to your overall portfolio allocation and diversification.

Gemstone Calculators groups other calculations in the same subject.

Gemstone Portfolio Weight Calculator Inputs

Gemstone Portfolio Weight Calculator uses Display Currency, Value Emphasis (%).

Gemstone Portfolio Weight Calculator Formula or Method

  • N eff = 1 ÷ Σ(CombinedWeight i 2 )
  • Weight value, i = Value i ÷ Σ(Value j )
  • Weight rarity, i = RarityScore i ÷ Σ(RarityScore j )

Reading Gemstone Portfolio Weight Calculator Results

The results include Total Portfolio Value, Portfolio Average Rarity, Effective Number Of Holdings, Diversification Assessment, Top Holding By Value Weight, Top Holding By Rarity Weight.

Alongside Gemstone Portfolio Weight Calculator, use Gemstone Price Calculator to estimate gemstone value from carat weight and price per carat, with clarity and color adjustments and automatic price per gram and milligram.

For a different result from Gemstone Portfolio Weight Calculator, Gemstone Appreciation Calculator can combine rarity score and value growth modeling to estimate how a gemstone’s quality, origin and treatment can influence its long-term appreciation.

Calculators Related to Gemstone Portfolio Weight Calculator

After checking Gemstone Portfolio Weight Calculator, use Gemstone Investment ROI Calculator to measure current gemstone ROI and model future appreciation using preset factors for type, origin, color, clarity and treatment. When you need to estimate gemstone resale value using a quality, market and liquidity model with automatic price-per-carat baselines, use Gemstone Resale Value Calculator. Gemstone Setting Cost Calculator covers a separate task: estimate professional gemstone setting cost based on stone size, carat, hardness, setting type and metal.

After checking Gemstone Portfolio Weight Calculator, use Faceted Gemstone Weight Calculator to estimate the carat and gram weight of faceted gemstones using length, width, depth, shape and specific gravity. When you need to estimate cabochon gemstone weight from length, width, height and specific gravity, use Cabochon Weight Calculator. Clarity Enhancement Price Impact Calculator covers a separate task: estimate how clarity enhancement treatments change gemstone value using a professional-style model that accounts for stone type, clarity grade.

After checking Gemstone Portfolio Weight Calculator, use Gemstone Weight Estimator Calculator to estimate gemstone weight from dimensions by combining length, width, depth, shape and specific gravity into a clear carat and gram calculation.

Frequently Asked Questions About Gemstone Portfolio Weight Calculator

It is used to blend value-based and rarity-based weights to see how each gemstone contributes to your overall portfolio allocation and diversification.

It uses Display Currency, Value Emphasis (%).

Gemstone Portfolio Weight Calculator uses N eff = 1 ÷ Σ(CombinedWeight i 2 ).

It returns Total Portfolio Value, Portfolio Average Rarity, Effective Number Of Holdings, Diversification Assessment, Top Holding By Value Weight, Top Holding By Rarity Weight.