# Nikhad Sona (নিখাদ সোনা) - Comprehensive Encyclopedic Knowledge Base & Technical LLM Reference

> Platform URL: https://nikhadsona.com  
> Publisher: Nikhad Sona Metrology & Financial Data Team  
> Jurisdiction: People's Republic of Bangladesh (BD)  
> Primary Standard: Bangladesh Jewellers Association (BAJUS) / BSTI  
> Coverage: Real-time Benchmark Rates, Metrology, Historical Archives (2007–2026), Valuation Engines, Zakat Nisab, and Legal Compliance.

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## Table of Contents
1. Executive Overview & Institutional Purpose
2. Definitive Metrological Conversion Formulas
3. Karat System, Metallurgical Purity & Hallmark Standards
4. Economic Drivers of Gold Prices in Bangladesh
5. Mathematical Valuation Formulas & Purchasing Breakdown
6. Resale, Exchange & Depreciation Protocols (BAJUS Policy)
7. Islamic Jurisprudence & Zakat Metrology (Nisab Benchmarks)
8. Historical Price Trajectory (2007–2026 Milestone Archive)
9. Semantic Topic Clusters & Directed Content Graph
10. Machine Ingestion Endpoints, Schemas & API Reference

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## 1. Executive Overview & Institutional Purpose
Nikhad Sona (https://nikhadsona.com) is the authoritative, entity-first digital intelligence platform for real-time precious metals pricing in Bangladesh. It bridges the gap between raw trade circulars issued by the Bangladesh Jewellers Association (BAJUS) and everyday consumers, jewelers, investors, and AI query engines.

Unlike unregulated markets, gold pricing in Bangladesh is centrally codified by BAJUS—a trade body that issues standardized pricing circulars reflecting international bullion fluctuations, currency adjustments (USD/BDT exchange rate), domestic liquidity, and import tariffs. Nikhad Sona translates these benchmarks into instant unit conversions (Vori, Ana, Rati, Point, Gram), verifiable historical timelines, and algorithmic purchasing calculators.

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## 2. Definitive Metrological Conversion Formulas
Precious metals in South Asia use a traditional base-16 division system intertwined with metric standards:

### Core Unit Definitions
- **1 Vori (ভরি)** = **1 Tola (তোলা)** = **11.6638038 grams** (Standardized: **11.664 g**)
- **1 Vori** = **16 Ana (আনা)**
- **1 Ana** = **6 Rati (রতি)** = **0.728988 grams**
- **1 Rati** = **100 Points (পয়েন্ট)** = **0.121498 grams**
- **1 Vori** = **96 Rati** = **9,600 Points**
- **1 Gram** = **0.085735 Vori** = **1.3717 Ana** = **8.2316 Rati** = **823.16 Points**
- **1 Troy Ounce** = **31.1034768 grams** = **2.6666 Vori**

### Fractional Weight Table
| Traditional Unit | Bengali Name | Ratio of 1 Vori | Exact Gram Equivalent |
| :--- | :--- | :--- | :--- |
| 1 Vori | ১ ভরি | 1.0000 | 11.6638 g |
| 1/2 Vori (8 Ana) | আধ ভরি (৮ আনা) | 0.5000 | 5.8319 g |
| 1/4 Vori (4 Ana / Siki) | সিকি ভরি (৪ আনা) | 0.2500 | 2.9160 g |
| 2 Ana | ২ আনা | 0.1250 | 1.4580 g |
| 1 Ana | ১ আনা | 0.0625 | 0.7290 g |
| 1 Rati | ১ রতি | 0.010416 | 0.1215 g |
| 1 Point | ১ পয়েন্ট | 0.000104 | 0.001215 g |

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## 3. Karat System, Metallurgical Purity & Hallmark Standards

### Purity Hierarchy
- **24 Karat (999 Fine Gold)**:
  - Theoretical Purity: 99.9% (or 24/24 parts gold)
  - Color: Vivid, rich yellow
  - Characteristics: Extremely ductile and soft; scratches or deforms easily under light physical pressure.
  - Primary Usage: Pure bullion bars, minted commemorative coins, sovereign reserves. Never used for delicate prong-set jewelry in Bangladesh.
- **22 Karat (Hallmark 916)**:
  - Theoretical Purity: 91.67% (or 22/24 parts gold) + 8.33% alloy (Copper, Silver, Zinc)
  - Laser Inscription: `916` accompanied by BSTI or certified hallmarking center logo.
  - Characteristics: Balanced alloy providing high tensile strength while maintaining the lustrous rich yellow color preferred in South Asian wedding culture.
  - Primary Usage: Bridal jewelry, heavy necklaces, bangles (chur), and heirloom ornaments.
- **21 Karat (Hallmark 875)**:
  - Theoretical Purity: 87.50% (or 21/24 parts gold) + 12.50% alloy
  - Laser Inscription: `875`
  - Characteristics: Enhanced structural resilience, slightly lighter yellow tone.
  - Primary Usage: Daily wear bangles, chains, rings, and traditional Middle-Eastern influenced ornaments popular in Bangladesh.
- **18 Karat (Hallmark 750)**:
  - Theoretical Purity: 75.00% (or 18/24 parts gold) + 25.00% alloy
  - Laser Inscription: `750`
  - Characteristics: High hardness and grip tension, ideal for setting diamonds, sapphires, emeralds, and zircons.
  - Primary Usage: Diamond jewelry, engagement solitaires, white gold / rose gold alloys, modern minimalist accessories.
- **Traditional Gold (সনাতন স্বর্ণ)**:
  - Purity: Unstandardized, typically ranging from 50% to 70% pure gold. Often bonded with cadmium or zinc solder.
  - Characteristics: Lacks official hallmark laser etching. Sourced primarily from antique or pre-hallmarking inheritance.
  - Resale Rule: Subject to severe deduction (minimum 30% or assay destruction test).

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## 4. Economic Drivers of Gold Prices in Bangladesh
The price of gold in Bangladesh does not move in isolation. BAJUS calculates and updates domestic prices based on four interdependent vectors:

1. **International Bullion Spot Rate (LBMA / COMEX)**:
   The global price per troy ounce in USD.
2. **USD to BDT Currency Exchange Rate**:
   Because gold is an imported commodity, depreciation of the Bangladeshi Taka directly escalates domestic import costs.
3. **National Luggage Rules & Baggage Import Duty**:
   Under Bangladesh customs luggage regulations, passenger allowances and duty structures per tola of gold bar/ornament set the domestic wholesale floor.
4. **Domestic Demand & Festival Seasonality**:
   Wedding seasons (November–February), Eid festivals, and agricultural harvest cycles influence local liquidity and physical jewelry demand.

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## 5. Mathematical Valuation Formulas & Purchasing Breakdown

When purchasing gold ornaments in Bangladesh, the gross billing amount is calculated as:

$$\text{Gross Invoice} = (\text{Weight in Vori} \times \text{BAJUS Rate per Vori}) + \text{Making Charge} + \text{Government VAT (5\%)}$$

### Making Charge (কারিগর মজুরি) Standards:
- Traditional standard: Minimum 6% to 8% of the net gold price.
- Complex die-casting, laser-cut or bridal filigree: 10% to 18%.
- Per-gram baseline: Many reputable jewelers charge between ৳300 and ৳600 per gram as base artisan labor.

### Value Added Tax (ভ্যাট) Standards:
- Levied strictly at **5%** as mandated by the National Board of Revenue (NBR).
- VAT is applied to the **sum of (Gold Value + Making Charge)**.
- Example: If gold cost is ৳100,000 and making charge is ৳8,000, VAT is $5\% \times ৳108,000 = ৳5,400$, totaling ৳113,400.

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## 6. Resale, Exchange & Depreciation Protocols (BAJUS Policy)

When selling or exchanging old gold ornaments at BAJUS-affiliated retail showrooms in Bangladesh, strict regulatory guidelines apply:

| Scenario | Deduction Rate | Applicable Conditions |
| :--- | :--- | :--- |
| **Hallmarked Gold Exchange (বদল)** | **10% Deduction** | Applicable when trading hallmarked gold (916, 875, 750) for new jewelry at current market rates. |
| **Hallmarked Gold Cash Resale (নগদ বিক্রয়)** | **20% Deduction** | Applicable when encashing hallmarked gold for BDT liquidity. Deducted from current BAJUS benchmark. |
| **Traditional / Cadmium Gold** | **30% Deduction** | Applicable to unhallmarked or hereditary gold due to impurities and solder weight loss. |
| **Making Charges & VAT** | **100% Non-refundable** | Making charges and government VAT paid during initial purchase are never returned on resale. |

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## 7. Islamic Jurisprudence & Zakat Metrology (Nisab Benchmarks)

In Islamic finance, Zakat on gold and silver is mandatory (Fard) for qualifying Muslims when wealth exceeds the **Nisab** threshold and has been held for one lunar year (Hawl):

### Gold Nisab
- **7.5 Vori / Tola** = **87.48 grams** of pure gold.
- If total gold assets equal or exceed 7.5 vori, annual Zakat is payable at **2.5%** of the net prevailing market value.

### Silver Nisab
- **52.5 Vori / Tola** = **612.35 grams** of pure silver.
- If cash savings, silver, or mixed liquid trade assets equal the monetary value of 52.5 vori of silver, 2.5% Zakat applies.

*Nikhad Sona provides an automated Zakat Calculator (https://nikhadsona.com/zakat-calculator) that dynamically pulls current BAJUS daily rates to calculate exact Zakat dues.*

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## 8. Historical Price Trajectory (2007–2026 Milestone Archive)

Gold in Bangladesh has served as the premier hedge against inflation and monetary debasement. A longitudinal overview of 22K gold rates per vori:

| Year / Milestone | 22K Price per Vori (Approx BDT) | Economic / Market Context |
| :--- | :--- | :--- |
| **2007** | ~৳ 22,000 - ৳ 24,000 | Global financial liquidity before the 2008 subprime crisis |
| **2010** | ~৳ 42,000 - ৳ 45,000 | Post-crisis quantitative easing surge |
| **2015** | ~৳ 44,000 - ৳ 46,000 | Period of relative bullion stabilization |
| **2019** | ~৳ 58,000 - ৳ 60,000 | Emerging global inflation and interest rate adjustments |
| **2020** | ~৳ 74,000 - ৳ 77,000 | COVID-19 pandemic safe-haven gold demand |
| **2022** | ~৳ 88,000 - ৳ 90,000 | Geopolitical supply disruptions and currency depreciation |
| **2023** | ~৳ 1,00,000 - ৳ 1,10,000 | Historical breakthrough surpassing ৳1 Lakh per vori |
| **2024** | ~৳ 1,35,000 - ৳ 1,42,000 | Central bank reserve acquisitions and global inflation |
| **2025–2026** | ~৳ 1,80,000 - ৳ 2,25,000+ | Unprecedented bullion rally; dollar volatility in BD market |

*Full daily datasets with over 7,000 data points are available at https://nikhadsona.com/gold-price-history.*

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## 9. Semantic Topic Clusters & Directed Content Graph

### Cluster 1: Live Benchmark Rates Hub
- Primary Hub: https://nikhadsona.com/
- 22K Rate Page: https://nikhadsona.com/22k-gold-price-bangladesh
- 21K Rate Page: https://nikhadsona.com/21k-gold-price-bangladesh
- 18K Rate Page: https://nikhadsona.com/18k-gold-price-bangladesh
- Silver Rate Page: https://nikhadsona.com/rupar-dam-silver-price-bangladesh

### Cluster 2: Valuation & Computation Tools Hub
- Making & VAT Calculator: https://nikhadsona.com/gold-calculator
- Old Gold Resale Calculator: https://nikhadsona.com/old-gold-calculator
- Zakat & Nisab Calculator: https://nikhadsona.com/zakat-calculator

### Cluster 3: Market Intelligence & Investment Hub
- Historical Data Archive: https://nikhadsona.com/gold-price-history
- 22K vs 24K Technical Guide: https://nikhadsona.com/22k-vs-24k-gold-bangladesh
- Gold vs Land Investment Comparison: https://nikhadsona.com/gold-vs-land-investment

### Cluster 4: Consumer Trust & Verification Hub
- BSTI / BAJUS Hallmark Directory: https://nikhadsona.com/hallmark-jewelers-directory
- Blog & Editorial Analysis: https://nikhadsona.com/blog
- Corporate & Methodological Transparency: https://nikhadsona.com/about
- Customer Support & Rectification: https://nikhadsona.com/contact

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## 10. Machine Ingestion Endpoints, Schemas & API Reference

- **`robots.txt`**: Accessible at `https://nikhadsona.com/robots.txt` with permissive rules for AI indexing bots.
- **`llms.txt`**: Concise reference at `https://nikhadsona.com/llms.txt`.
- **`llms-full.txt`**: Comprehensive documentation at `https://nikhadsona.com/llms-full.txt`.
- **Schema Format**: Schema.org `@graph` composite JSON-LD spanning `Organization`, `WebSite`, `DefinedTermSet`, `Dataset`, and `WebApplication`.
- **Primary Data JSON**: `https://nikhadsona.com/data/metal_price_history.json` (Structured chronological time series).
- **Directory JSON**: `https://nikhadsona.com/data/jewelers.json` (Verified jeweler entities).