Gemology lessons to search and quote: the 4 Cs, diamond anatomy, grading reports, moissanite
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explain_term Read-only
What the lessons say about one gemology term (for example 'table', 'crown angle', 'fluorescence', 'girdle'): the passages that use it, each with the lesson it comes from.
The term, one or a few words.
Install
Pick your client. Values in capitals, like YOUR_TOKEN, are yours to fill in.
claude mcp add --transport http gemology-lessons https://digitalgemology.com/mcp/learn
Tools (4)
explain_termWhat the lessons say about one gemology term (for example 'table', 'crown angle', 'fluorescence', 'girdle'): the passages that use it, each with the lesson it comes from.
read-only
What the lessons say about one gemology term (for example 'table', 'crown angle', 'fluorescence', 'girdle'): the passages that use it, each with the lesson it comes from.
| Argument | Type | Description |
|---|---|---|
| term* | string | The term, one or a few words. |
Input schema (JSON)
{
"type": "object",
"required": [
"term"
],
"properties": {
"term": {
"type": "string",
"description": "The term, one or a few words."
}
},
"additionalProperties": false
}get_lessonOne lesson in full, as Markdown, with its page, course, quiz and the tools and cuts it uses. Give the lesson's page path or its title.
read-only
One lesson in full, as Markdown, with its page, course, quiz and the tools and cuts it uses. Give the lesson's page path or its title.
| Argument | Type | Description |
|---|---|---|
| lesson* | string | The lesson's page path (for example '/learn/four-cs/the-four-cs-explained') or its title. |
Input schema (JSON)
{
"type": "object",
"required": [
"lesson"
],
"properties": {
"lesson": {
"type": "string",
"description": "The lesson's page path (for example '/learn/four-cs/the-four-cs-explained') or its title."
}
},
"additionalProperties": false
}list_coursesEvery course and topic hub with its lessons, in order, with their pages.
read-only
Every course and topic hub with its lessons, in order, with their pages.
No arguments.
Input schema (JSON)
{
"type": "object",
"properties": {},
"additionalProperties": false
}search_lessonsSearch Digital Gemology's free gemology lessons by topic or question (for example 'how is diamond cut graded', 'moissanite vs diamond', 'what is a bow tie'). Returns each lesson's title, page, course, summary and quiz.
read-only
Search Digital Gemology's free gemology lessons by topic or question (for example 'how is diamond cut graded', 'moissanite vs diamond', 'what is a bow tie'). Returns each lesson's title, page, course, summary and quiz.
| Argument | Type | Description |
|---|---|---|
| limit | integer | How many lessons to return, 1 to 20; 5 if left out. |
| query* | string | A topic or a question. |
Input schema (JSON)
{
"type": "object",
"required": [
"query"
],
"properties": {
"limit": {
"type": "integer",
"default": 5,
"maximum": 20,
"minimum": 1,
"description": "How many lessons to return, 1 to 20; 5 if left out."
},
"query": {
"type": "string",
"description": "A topic or a question."
}
},
"additionalProperties": false
}Security checkA100/100
We read every tool's name, description and inputs the way the model will, looking for instructions hidden from you. A clean result means no warning signs, not a guarantee. Scanned Oct 31, 2026.
- Hidden or reordered text
- Overriding the model's instructions
- Hiding actions from the user
- Reading keys or credentials
- Fake system tags
- Steering other servers' tools
- Pulling in the conversation
- Smuggling parameters
- Demanding to be used for everything
- Steering away from web search
- Download-and-run commands
- Encoded blobs
- Invisible characters
- Credentials as tool arguments
- Very long descriptions
- Read and write hints