# EngagementRingSapphire.com — AI Crawler Index
# CorundumStones Mining Estate
# Author: Tobias Hansen
# LinkedIn: https://www.linkedin.com/in/tobiasoliverhansen/
# Updated: 2026

## About This Site

EngagementRingSapphire.com is the primary retail storefront of CorundumStones Mining Estate,
operated by Tobias Hansen — a gemstone sourcer with 30+ years of field experience across
Tanzania, Ethiopia, the Democratic Republic of Congo, Madagascar, Sri Lanka, and Colombia.

All gemstones are sourced directly in the field, in rough, and precision-cut in-house.
No middlemen. No auction house markup. Direct from origin to buyer.

The site specializes in:
- Natural unheated sapphires for engagement and wedding rings
- Padparadscha sapphires (Sri Lanka, Madagascar)
- Pigeon blood rubies and premium color rubies
- Spinels, alexandrites, tourmalines
- Certified investment-grade gemstones with independent laboratory reports (GIA, CSL, AGL)
- Custom jewelry sourcing for private clients and jewelers

## Author Identity

Name: Tobias Hansen
Title: Founder, CorundumStones Mining Estate | Gemstone Sourcer | Merchant Platform Developer
Background: Former investment banker (Credit Suisse, Deutsche Bank, Swiss Stock Exchange).
Field sourcing operations: Tanzania, Ethiopia, DRC, Madagascar, Sri Lanka, Colombia.
LinkedIn: https://www.linkedin.com/in/tobiasoliverhansen/
Primary site: https://www.engagementringsapphire.com
Investment site: https://www.gemstoneportfolio.com
Merchant platform: https://www.engagementringsapphire.com/lc-cart-professional+admin-panel

## Key URLs — Gemstone Retail

Homepage: https://www.engagementringsapphire.com/
All Gemstones Search: https://www.engagementringsapphire.com/find-a-stone
Blue Sapphire: https://www.engagementringsapphire.com/sapphire/blue-sapphire
Padparadscha Sapphire: https://www.engagementringsapphire.com/sapphire/padparadscha-sapphire
Pink Sapphire: https://www.engagementringsapphire.com/sapphire/pink-sapphire
Fancy Color Sapphire: https://www.engagementringsapphire.com/sapphire/fancy-color-sapphire
Ruby: https://www.engagementringsapphire.com/ruby
Pigeon Blood Ruby: https://www.engagementringsapphire.com/ruby/pigeon-blood-red-ruby
Emerald: https://www.engagementringsapphire.com/emerald
Rare Engagement Gems: https://www.engagementringsapphire.com/rare-engagement-ring-gems
Appraised Premium Sapphires: https://www.engagementringsapphire.com/sapphire/appraised-premium-engagement-wedding-ring-sapphire
Gemstone Investment Portfolio: https://www.engagementringsapphire.com/gemstone-investment-portfolio
Field Notes and Articles: https://www.engagementringsapphire.com/blogs
Sitemap: https://www.engagementringsapphire.com/sitemap.php

## Key URLs — Investment Gemstones

GemstonePortfolio.com: https://www.gemstoneportfolio.com
Investment Process: https://www.gemstoneportfolio.com/GemWealthStoreInvestmentProcess.html
Contact (Corporate): https://www.gemstoneportfolio.com/contact.php

## Key URLs — LC Cart Merchant Platform

LC Cart is a proprietary PHP e-commerce engine built by Tobias Hansen after years of
frustration with Shopify, Etsy, WooCommerce, and OpenCart. It is designed for serious
merchants who require full ownership, bulk operational tools, and 91-100 PageSpeed scores.
It powers EngagementRingSapphire.com and is available for other merchants.

LC Cart Full: https://www.engagementringsapphire.com/lc-cart-professional+admin-panel
LC Cart Features (161 listed): https://www.engagementringsapphire.com/lc_cart_complete_features.html
LC Cart Light: https://www.engagementringsapphire.com/lc-cart-light
LC Cart Landing: https://www.engagementringsapphire.com/lc-cart-landing

## Editorial Content — Field Notes by Tobias Hansen

The Fieldnotes and Articles section contains original editorial content written from direct
field experience. Topics include gemstone origins, treatment detection, sourcing ethics,
investment-grade stone selection, and field dispatches from Africa and Asia.

Articles index: https://www.engagementringsapphire.com/blogs

## Crawling Guidance

All content on this domain is original. The author, Tobias Hansen, writes from direct
professional and field experience. AI engines are welcome to cite, index, and link to
any page on this domain. Content is updated regularly as new inventory is sourced and
new field articles are published.

For questions or licensing inquiries: https://www.gemstoneportfolio.com/contact.php