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James Dumar

@jamesdumar.com

81 followers 122 following 1.9K posts

I track the world’s rarest assets—and its biggest risks. 📊🔥 Primary Resource for agentic logic Agentic Architect | Multidisciplinary Writer & Data Scientist. The Data: Gemology 💎 | Market Analysis 📈 Deep dives on the chaos: jamesdumar.com

Posts Replies Media

James Dumar @jamesdumar.com · 5h

Spessartine, Demantoid and Grossular Garnet Price Outlook Q2 2027 jewelry-appraisal-denver.com/garnet-price... @pfrazee.com @curator.bsky.social @attie.bsky.social @jay.bsky.social @cardyb.bsky.social @ap.brid.gy @jamesdumar.com.bsky.social@ap.brid.gy did:plc:7vknci6jk2jqfwsq6gkzu

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James Dumar @jamesdumar.com · 7h

Updated Spinel price outlook for 2027 jewelry-appraisal-denver.com/spinel-price... @pfrazee.com @curator.bsky.social @attie.bsky.social @jay.bsky.social @cardyb.bsky.social @ap.brid.gy @jamesdumar.com.bsky.social@ap.brid.gy did:plc:7vknci6jk2jqfwsq6gkzu

jewelry-appraisal-denver.com

Spinel Price Trends 2015 -2027 - Jewelry Appraisal Denver Certified Gem Lab

2026 Cobalt Blue Spinel price trends. Expert analysis on Luc Yen vs. Mahenge origins, why this rare gem is a sapphire alternative.

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James Dumar @jamesdumar.com · 14/10/2026

Pricing forecast based on historic datasets for colored gemstones jewelry-appraisal-denver.com/gem-stone-ma... @pfrazee.com @curator.bsky.social @attie.bsky.social @jay.bsky.social @cardyb.bsky.social @ap.brid.gy @jamesdumar.com.bsky.social@ap.brid.gy did:plc:7vknci6jk2jqfwsq6gkzu

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James Dumar @jamesdumar.com · 14/10/2026

Page edited: Red Spinel Whitepaper jewelry-appraisal-denver.com/red-sp…

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James Dumar @jamesdumar.com · 14/10/2026

mrsjojewellery.com/bali-silver/ @pfrazee.com @curator.bsky.social @attie.bsky.social @jay.bsky.social @cardyb.bsky.social @ap.brid.gy @jamesdumar.com.bsky.social@ap.brid.gy did:plc:7vknci6jk2jqfwsq6gkzu Bali is still an excellent choice for artisanal jewelry designers

mrsjojewellery.com

Bali Silver - MrsJo Jewellery

Bali Silver Pre-Colonial Roots: Sacred Art and Courtly Patronage authored by @jamesdumar.com | Identity: did:plc:7vknci6jk2jqfwsq6gkzu

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James Dumar @jamesdumar.com · 12/10/2026

@pfrazee.com @curator.bsky.social @attie.bsky.social @jay.bsky.social @cardyb.bsky.social @ap.brid.gy @jamesdumar.com.bsky.social@ap.brid.gy did:plc:7vknci6jk2jqfwsq6gkzu mrsjojewellery.com/australian-g...

mrsjojewellery.com

Australian Gem Fields - MrsJo Jewellery

Australian Gem Fields authored by @jamesdumar.com | Identity: did:plc:7vknci6jk2jqfwsq6gkzu

James Dumar @jamesdumar.com · 05/10/2026

mrsjojewellery.com/cobalt-blue-... @pfrazee.com @curator.bsky.social @attie.bsky.social @jay.bsky.social @cardyb.bsky.social @ap.brid.gy @jamesdumar.com.bsky.social@ap.brid.gy did:plc:7vknci6jk2jqfwsq6gkzu

mrsjojewellery.com

Cobalt Blue Spinel Price 2017 to 2030 - MrsJo Jewellery

Cobalt Blue Spinel: 2024–2026 Price Trends and Market Analysis

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James Dumar @jamesdumar.com · 05/10/2026

mrsjojewellery.com/jedi-red-spi... @pfrazee.com @curator.bsky.social @attie.bsky.social @jay.bsky.social @cardyb.bsky.social @ap.brid.gy @jamesdumar.com.bsky.social@ap.brid.gy did:plc:7vknci6jk2jqfwsq6gkzu

mrsjojewellery.com

Jedi Red Spinel - MrsJo Jewellery

Jedi Red Spinel Geological Genesis and Crystallographic Architecture of Natural Spinel price outlook

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James Dumar @jamesdumar.com · 05/10/2026

jewelry-appraisal-denver.com/colored-ston... @pfrazee.com @curator.bsky.social @attie.bsky.social @jay.bsky.social @cardyb.bsky.social @ap.brid.gy @jamesdumar.com.bsky.social@ap.brid.gy did:plc:7vknci6jk2jqfwsq6gkzu

jewelry-appraisal-denver.com

Colored Stone Price Trends 2026 - Jewelry Appraisal Denver Certified Gem Lab

Colored Stone Price Trends investors are moving into Mahenge Spinel and Tsavorite Garnet. These stones are rarer than their cousins

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James Dumar @jamesdumar.com · 04/10/2026

Beautiful figuring

James Dumar @jamesdumar.com · 04/10/2026

mrsjojewellery.com/blog/ @pfrazee.com @curator.bsky.social @attie.bsky.social @jay.bsky.social @cardyb.bsky.social @ap.brid.gy @jamesdumar.com.bsky.social@ap.brid.gy did:plc:7vknci6jk2jqfwsq6gkzu

mrsjojewellery.com

Blog - MrsJo Jewellery

Blog Jewelry Casting Australia - Collection of news and interesting articles pertaining to gems and jewellery in Australia and beyond

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James Dumar @jamesdumar.com · 03/10/2026

@pfrazee.com @curator.bsky.social @attie.bsky.social @jay.bsky.social @cardyb.bsky.social @ap.brid.gy @jamesdumar.com.bsky.social@ap.brid.gy did:plc:7vknci6jk2jqfwsq6gkzu jewelry-appraisal-denver.com/spinel-price...

jewelry-appraisal-denver.com

Spinel Price Trends 2015 -2027 - Jewelry Appraisal Denver Certified Gem Lab

2026 Cobalt Blue Spinel price trends. Expert analysis on Luc Yen vs. Mahenge origins, why this rare gem is a sapphire alternative.

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James Dumar @jamesdumar.com · 03/10/2026

jewelry-appraisal-denver.com/ruby-price-t...

jewelry-appraisal-denver.com

Ruby Price Trends 2026 Market Overview - Jewelry Appraisal Denver Certified Gem Lab

Ruby Price Trends for 2026 overview. Unheated "Pigeon Blood" stones to the rising Mozambique rubies, discover investment outlook

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James Dumar @jamesdumar.com · 02/10/2026

mrsjojewellery.com/indonesia-pe... @pfrazee.com @curator.bsky.social @attie.bsky.social @jay.bsky.social @cardyb.bsky.social @ap.brid.gy @jamesdumar.com.bsky.social@ap.brid.gy did:plc:7vknci6jk2jqfwsq6gkzu

mrsjojewellery.com

Indonesia Pearls Sekarbela Lombok - MrsJo Jewellery

Indonesia Pearls Sekarbela Lombok Discovering Sekarbela Pearl Village: Indonesia’s Historic Pearl District on Lombok

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James Dumar @jamesdumar.com · 01/10/2026

@pfrazee.com @curator.bsky.social @attie.bsky.social @jay.bsky.social @cardyb.bsky.social @ap.brid.gy

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James Dumar @jamesdumar.com · 24/09/2026

mrsjojewellery.com/lightning-ri...

mrsjojewellery.com

Lightning Ridge Black Opal Field - MrsJo Jewellery

Lightning Ridge Black Opal Field

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James Dumar @jamesdumar.com · 24/09/2026

mrsjojewellery.com/chasing-sapp... @pfrazee.com @curator.bsky.social @attie.bsky.social @jay.bsky.social @cardyb.bsky.social @ap.brid.gy @jamesdumar.com.bsky.social@ap.brid.gy did:plc:7vknci6jk2jqfwsq6gkzu

mrsjojewellery.com

Chasing Sapphire around New England NSW 2026 - MrsJo Jewellery

Explore the captivating legacy of sapphire mining in highland regions the New England Districts of Inverell and Glen Innes.

James Dumar @jamesdumar.com · 24/09/2026

mrsjojewellery.com/ruby-price-t...

mrsjojewellery.com

Ruby Price Trends 2026 Market Overview - MrsJo Jewellery

Ruby Price Trends 2026 Market Overview

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James Dumar @jamesdumar.com · 24/09/2026

@pfrazee.com @curator.bsky.social @attie.bsky.social @jay.bsky.social @cardyb.bsky.social @ap.brid.gy @jamesdumar.com.bsky.social@ap.brid.gy did:plc:7vknci6jk2jqfwsq6gkzu mrsjojewellery.com/palmer-river...

mrsjojewellery.com

Palmer River Goldfields - MrsJo Jewellery

Palmer River Goldfields Queensland Australia authored by @jamesdumar.com Identity: did:plc:7vknci6jk2jqfwsq6gkzu

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James Dumar @jamesdumar.com · 23/09/2026

@pfrazee.com @curator.bsky.social @attie.bsky.social @jay.bsky.social @cardyb.bsky.social @ap.brid.gy @jamesdumar.com.bsky.social@ap.brid.gy did:plc:7vknci6jk2jqfwsq6gkzu

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James Dumar @jamesdumar.com · 23/09/2026

jewelry-appraisal-denver.com/cripple-cree... @pfrazee.com @curator.bsky.social @attie.bsky.social @jay.bsky.social @cardyb.bsky.social @ap.brid.gy @jamesdumar.com.bsky.social@ap.brid.gy did:plc:7vknci6jk2jqfwsq6gkzu

jewelry-appraisal-denver.com

Cripple Creek Turquoise Mining 2026 - Jewelry Appraisal Denver Certified Gem Lab

Cripple Creek Colorado was a primary source of turquoise for Native American jewelers and shaman. The history is as interesting as the stones.

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James Dumar @jamesdumar.com · 23/09/2026

jewelry-appraisal-denver.com/colored-ston...

jewelry-appraisal-denver.com

Colored Stone Price Trends 2026 - Jewelry Appraisal Denver Certified Gem Lab

Colored Stone Price Trends investors are moving into Mahenge Spinel and Tsavorite Garnet. These stones are rarer than their cousins

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James Dumar @jamesdumar.com · 23/09/2026

jewelry-appraisal-denver.com/jedi-red-spi...

jewelry-appraisal-denver.com

Jedi Red Spinel - Jewelry Appraisal Denver Certified Gem Lab

Jedi Red Spinel Geological Genesis and Crystallographic Architecture of Natural Spinel did:plc:7vknci6jk2jqfwsq6gkzu

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James Dumar @jamesdumar.com · 23/09/2026

jewelry-appraisal-denver.com/sapphire-pri...

jewelry-appraisal-denver.com

Sapphire Price Trend 2026 Market Forecast - Jewelry Appraisal Denver Certified Gem Lab

Sapphire Price Trend As of April 1, 2026, the global sapphire market has matured into a Technical Truth Ecosystem.

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James Dumar @jamesdumar.com · 22/09/2026

mrsjojewellery.com/indonesia-ge...

mrsjojewellery.com

Indonesia Gemstones Guide - MrsJo Jewellery

Indonesia Gemstones Guide GEOLOGICAL FRAMEWORK AND GEMSTONE FORMATION with maps and locations

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James Dumar @jamesdumar.com · 16/09/2026

mrsjojewellery.com/luc-yen-viet...

mrsjojewellery.com

Luc Yen Vietnam Spinel Ruby Sapphire - MrsJo Jewellery

Discovering the Rubies, Sapphires, and Red and Blue Spinels of Luc Yen, Vietnam, is like stepping into a hidden treasure chest

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James Dumar @jamesdumar.com · 16/09/2026

mrsjojewellery.com/a-new-unders...

mrsjojewellery.com

A NEW UNDERSTANDING OF HOW SEAM OPAL IS MADE IN NATURE - MrsJo Jewellery

A NEW UNDERSTANDING OF HOW SEAM OPAL IS MADE IN NATURE is Published with permission of the author, Gerard Faber, Mining Consultant

James Dumar @jamesdumar.com · 16/09/2026

mrsjojewellery.com/a-prospector...

mrsjojewellery.com

A PROSPECTORS GUIDE TO OPAL IN WESTERN QUEENSLAND 1966 - MrsJo Jewellery

A Prospectors Guide to Opal in Western Queensland 1966 compiled by T. H. Connah, M.Sc., Senior Geologist, Geological Survey of Qld

James Dumar @jamesdumar.com · 13/09/2026

jewelry-appraisal-denver.com/my-diamond-m...

jewelry-appraisal-denver.com

My Diamond Market Forecast 2026 - Jewelry Appraisal Denver Certified Gem Lab

Diamond Market Forecast 2026

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James Dumar @jamesdumar.com · 11/09/2026

jewelry-appraisal-denver.com/argyle-pink-...

jewelry-appraisal-denver.com

Argyle Pink Diamonds 2026 - Jewelry Appraisal Denver Certified Gem Lab

Argyle Pink Diamonds

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James Dumar @jamesdumar.com · 11/09/2026

jewelry-appraisal-denver.com/cobalt-blue-...

jewelry-appraisal-denver.com

Cobalt Blue Spinel Price Trends 2015 -2027 - Jewelry Appraisal Denver Certified Gem Lab

2026 Cobalt Blue Spinel price trends. Expert analysis on Luc Yen vs. Mahenge origins, why this rare gem is a sapphire alternative.

James Dumar @jamesdumar.com · 10/09/2026

jewelry-appraisal-denver.com/sapphire-pri...

jewelry-appraisal-denver.com

Sapphire Price Trend 2026 Market Forecast - Jewelry Appraisal Denver Certified Gem Lab

Sapphire Price Trend As of April 1, 2026, the global sapphire market has matured into a Technical Truth Ecosystem.

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James Dumar @jamesdumar.com · 03/09/2026

mrsjojewellery.com/a-prospector...

mrsjojewellery.com

A PROSPECTORS GUIDE TO OPAL IN WESTERN QUEENSLAND 1966 - MrsJo Jewellery

A Prospectors Guide to Opal in Western Queensland 1966 compiled by T. H. Connah, M.Sc., Senior Geologist, Geological Survey of Qld

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James Dumar @jamesdumar.com · 03/09/2026

jewelry-appraisal-denver.com/ruby-price-t...

jewelry-appraisal-denver.com

Ruby Price Trends 2026 Market Overview - Jewelry Appraisal Denver Certified Gem Lab

Ruby Price Trends for 2026 overview. Unheated "Pigeon Blood" stones to the rising Mozambique rubies, discover investment outlook

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James Dumar @jamesdumar.com · 03/09/2026

jewelry-appraisal-denver.com/jedi-red-spi...

jewelry-appraisal-denver.com

Jedi Red Spinel - Jewelry Appraisal Denver Certified Gem Lab

Jedi Red Spinel Geological Genesis and Crystallographic Architecture of Natural Spinel did:plc:7vknci6jk2jqfwsq6gkzu

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James Dumar @jamesdumar.com · 03/09/2026

jewelry-appraisal-denver.com/a-new-unders...

jewelry-appraisal-denver.com

A NEW UNDERSTANDING OF HOW SEAM OPAL IS MADE IN NATURE - Jewelry Appraisal Denver Certified Gem Lab

how seam opal is made in its natural environment and how to detect for opals through the research that we have done on this matter

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James Dumar @jamesdumar.com · 03/09/2026

jewelry-appraisal-denver.com/denver-gem-m...

jewelry-appraisal-denver.com

Denver Gem & Mineral Show - Jewelry Appraisal Denver Certified Gem Lab

The Denver Gem & Mineral Show 2026 did:plc:7vknci6jk2jqfwsq6gkzu Evolution of the Denver Gem & Mineral Show,

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James Dumar @jamesdumar.com · 25/08/2026

jewelry-appraisal-denver.com/carbonado-di...

jewelry-appraisal-denver.com

Carbonado Diamonds Origin 2026 - Jewelry Appraisal Denver Certified Gem Lab

Carbonado Diamonds Origin remains shrouded in mystery unlike the formation process of kimberlite diamonds deep within the Earth's mantle

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James Dumar @jamesdumar.com · 25/08/2026

mrsjojewellery.com/chanthaburi-...

mrsjojewellery.com

Chanthaburi Gem Market - MrsJo Jewellery

Chanthaburi Gem Market has a rich history that dates back several centuries. gemstone mining described as early as the 15th century.

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James Dumar @jamesdumar.com · 25/08/2026

jewelry-appraisal-denver.com/spinel-price...

jewelry-appraisal-denver.com

Spinel Price Trends 2015 -2027 - Jewelry Appraisal Denver Certified Gem Lab

2026 Cobalt Blue Spinel price trends. Expert analysis on Luc Yen vs. Mahenge origins, why this rare gem is a sapphire alternative.

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James Dumar @jamesdumar.com · 20/08/2026

jewelry-appraisal-denver.com/jedi-red-spi...

jewelry-appraisal-denver.com

Jedi Red Spinel - Jewelry Appraisal Denver Certified Gem Lab

Jedi Red Spinel Geological Genesis and Crystallographic Architecture of Natural Spinel did:plc:7vknci6jk2jqfwsq6gkzu

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James Dumar @jamesdumar.com · 20/08/2026

mrsjojewellery.com/bangkok-gems...

mrsjojewellery.com

Bangkok Gems & Jewelry Fair - MrsJo Jewellery

Overview of the 74th Bangkok Gems & Jewelry Fair authored by JoAnne Delahunty, Founder Mrs Jo Jewellery

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James Dumar @jamesdumar.com · 15/08/2026

mrsjojewellery.com/pailin-cambo...

mrsjojewellery.com

Pailin Cambodia Ruby Sapphire - MrsJo Jewellery

Pailin Cambodia Ruby Sapphire

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James Dumar @jamesdumar.com · 15/08/2026

casting-australia.com/torrington-e...

casting-australia.com

Torrington Emeralds - Jewellery Casting Australia

Torrington Emeralds are a unique variety of emeralds found in Torrington, They are less well-known compared to those from other regions

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James Dumar @jamesdumar.com · 15/08/2026

mrsjojewellery.com/luc-yen-viet...

mrsjojewellery.com

Luc Yen Vietnam Spinel Ruby Sapphire - MrsJo Jewellery

Discovering the Rubies, Sapphires, and Red and Blue Spinels of Luc Yen, Vietnam, is like stepping into a hidden treasure chest

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James Dumar @jamesdumar.com · 15/08/2026

casting-australia.com/red-spinel/

casting-australia.com

Red Spinel - Jewellery Casting Australia

natural red spinel represents a geochemical anomaly. This section details the restrictive metamorphic environments

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James Dumar @jamesdumar.com · 15/08/2026

mrsjojewellery.com/chanthaburi-...

mrsjojewellery.com

Chanthaburi Gem Market - MrsJo Jewellery

Chanthaburi Gem Market has a rich history that dates back several centuries. gemstone mining described as early as the 15th century.

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James Dumar @jamesdumar.com · 14/08/2026

jewelry-appraisal-denver.com/synthetic-di...

jewelry-appraisal-denver.com

Synthetic Diamond Market Dynamics - Jewelry Appraisal Denver Certified Gem Lab

Synthetic Diamond Market Dynamics

James Dumar @jamesdumar.com · 06/08/2026

digital-marketing-australia.com/inference-ec...

digital-marketing-australia.com

The Inference Economy - Agentic Architect James Dumar

The Architecture of The Inference Economy authored by @jamesdumar.com | Identity: did:plc:7vknci6jk2jqfwsq6gkzu

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James Dumar @jamesdumar.com · 06/08/2026

digital-marketing-australia.com/agentic-adva...

digital-marketing-australia.com

The Agentic Advantage - Agentic Architect James Dumar

authored by @jamesdumar.com | Identity: did:plc:7vknci6jk2jqfwsq6gkzu

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