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Tanzanite: History & Regions
Tanzanite is the blue and violet variety of the mineral zoisite (a calcium aluminium hydroxyl sorosilicate). The color is caused by small amounts of vanadium. Tanzanite belongs to the epidote mineral group. Tanzanite is only found in Simanjiro District of Manyara Region in Tanzania, in a very small mining area approximately 7 km (4.3 mi) long and 2 km…
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Tanzanite topic overview
The analysis highlights History and Regions as prominent areas in the source structure around Tanzanite.
Related topics
75
Source areas
5
Connected nodes
80
Extracted relationships
97
Concept neighborhoods
16
Bridge connections
80
What this topic covers Research coverage
Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.
History · 27 topics
Overview · 22 topics
Imitation and cobalt-coated tanzanite · 15 topics
Factors affecting value: grading · 8 topics
Geology · 3 topics
Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.
Key facts & relationships
High-confidence facts extracted from structured source data. Use them as anchors for further research.
Birefringence
0.006–0.018
Category
Sorosilicate: zoisite variety
Cleavage
Perfect {010}, imperfect {100}
Color
Royal blue, indigo, violet/purple
Crystal habit
Prismatic crystals with striations; massive to columnar
Crystal system
Orthorhombic
Explore all related topics Closing gaps
A structured outline of related entities, concepts and subtopics. Open any item to build a new map centered on it.
Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.
Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.
How Tanzanite connects Entity context
Entity context groups extracted connections by relationship type. Counts show recurrence in the analyzed source; the examples are research signals, not claims about importance.
The extracted context around Tanzanite shows recurring relationship patterns in the source. For example, Tanzanite → America, Arusha, British Museum, Co, Correct, Dodoma, Gemological Institute, Goan, Harvard University, He, Heidelberg University, Henry, Hyman Saul, Ian McCloud, In July, John Saul, Kenya, Louis Comfort Tiffany, Manuel, Mererani Another extracted example is Tanzanite → Arusha Region, He, In, In January, Jumanne Mhero Ngoma, Kilimanjaro, Kiteto District, Manyara Region, Mererani, President Julius Nyerere, Same District, Science, Tanzania, Tanzania Commission, Technology, There, Tsh. Use these groups to spot repeated connection types before inspecting the individual relationships.
Tanzanite
Top relations
related to history· 34
Tanzanite → America, Arusha, British Museum, Co, Correct, Dodoma, Gemological Institute, Goan, Harvard University, He, Heidelberg University, Henry, Hyman Saul, Ian McCloud, In July, John Saul, Kenya, Louis Comfort Tiffany, Manuel, Mererani
related to Discovery· 17
Tanzanite → Arusha Region, He, In, In January, Jumanne Mhero Ngoma, Kilimanjaro, Kiteto District, Manyara Region, Mererani, President Julius Nyerere, Same District, Science, Tanzania, Tanzania Commission, Technology, There, Tsh
Relationships are represented as Subject → Predicate → Object triples. Confidence describes extraction strength, not the real-world importance of a relationship; lower-confidence rows may be contextual rather than explicit.
TTTA extracted 97 structured relationships around Tanzanite. Examples in this analysis include Tanzanite → Birefringence → 0.006–0.018 and Tanzanite → Category → Sorosilicate: zoisite variety. The table shows each extracted connection, where it came from and its confidence.
Subject
Predicate
Object
Confidence
Src
Tanzanite
Birefringence
0.006–0.018
1.00
infobox
Tanzanite
Category
Sorosilicate: zoisite variety
1.00
infobox
Tanzanite
Cleavage
Perfect {010}, imperfect {100}
1.00
infobox
Tanzanite
Color
Royal blue, indigo, violet/purple
1.00
infobox
Tanzanite
Crystal habit
Prismatic crystals with striations; massive to columnar
Present, dichroism or trichroism, depending on heat treatment
1.00
infobox
Tanzanite
Refractive index
1.69–1.70
1.00
infobox
Tanzanite
Space group
Pnma (no. 62)
1.00
infobox
Tanzanite
Specific gravity
3.10–3.38
1.00
infobox
Tanzanite
Streak
White or colorless
1.00
infobox
Tanzanite
Strunz classification
09.BG.10
1.00
infobox
Tanzanite
Twinning
penetration twins
1.00
infobox
Tanzanite
is a
blue and violet variety of the mineral zoisite
0.90
text
Tanzanite
is a
trichroic gemstone
0.90
text
No triples extracted yet.
Related concept clusters Concept neighborhoods
Concept neighborhoods group terms that sit near one another in the extracted graph. They are useful for discovering adjacent language and context, but proximity does not by itself imply a factual relationship.
The concept neighborhoods around Tanzanite bring nearby vocabulary together. In this analysis, examples include Violet, Stone and Crystal. Use the clusters to find adjacent concepts and terminology that may deserve separate research.
Tanzanite
Violet
Stone
Crystal
Tanzania
Forsterite
Appear
Million
Gemstone
Government
Heat
Mining
Tanzanian
tanzanite
Violet
Stone
Crystal
Tanzania
Forsterite
Appear
Million
Gemstone
Government
Heat
Mining
Tanzanian
imitation and cobalt-coated tanzanite
Violet
Stone
Crystal
Tanzania
Forsterite
Appear
Million
Gemstone
Government
Heat
Mining
Tanzanian
crystal
Trichroism
Pleochroism
Depending
Heat
Treatment
Violet
Sorosilicate
Variety
Tanzanite
Also
Brown
Different
zoisite
Variety
Sorosilicate
Gem
Mineral
Blue
Pleochroism
Also
Discovery
Market
Block
Crystal
Gemstone
sorosilicate
Variety
Zoisite
Pleochroism
Also
Discovery
Block
Crystal
Heat
Mining
Treatment
Violet
Tanzanite
tanzania
Government
Discovery
Mining
Tanzanian
Tanzanite
Small
Carats
Area
Million
Gemstone
Stones
tanzania commission for science and technology
Government
Discovery
Mining
Tanzanian
Tanzanite
Small
Carats
Area
Million
Gemstone
Stones
Connections between topic areas Semantic bridges
Semantic bridges connect parts of the graph that would otherwise be more separate. A bridge is a structural signal in this analysis, not a claim that the two topic areas are equivalent.
For Tanzanite, one of the stronger structural bridges in this analysis connects Tanzanite with History. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.
Number of nodes, edges, triples, density and central hubs. Use it to gauge the size and connectivity of the map.
Tanzanite
Nodes81
Edges80
Triples97
Avg. degree1.98
Density0.024691
Components1
Source & methodology
TTTA analyzes the structure around Tanzanite to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as History & Regions, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.
