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moissanite-tools

com.fitiny/moissanite-tools
Commerce & Retail Public & reachable MCP 2026-07-28

What this MCP does

Offers jewellery calculations for moissanite dimensions, grading, ring-size conversion, necklace placement and stud appearance.

Capabilities

Tools

6 tools
carat_to_mm
Diameter in millimetres for a given carat weight. Round brilliant cut. Density-corrected per stone - a diamond chart is wrong for moissanite by ~9%.
Input schema 
{'type': 'object', 'required': ['carat'], 'properties': {'carat': {'type': 'number', 'description': 'Carat weight, e.g. 1.0'}, 'stone': {'enum': ['moissanite', 'diamond', 'cz'], 'type': 'string', 'default': 'moissanite'}}}
grading_scale
GIA colour (D-K) or clarity (FL-SI) scale as used for moissanite, or published optical constants for moissanite / diamond / cubic zirconia.
Input schema 
{'type': 'object', 'required': ['scale'], 'properties': {'grade': {'type': 'string', 'description': 'Optional single grade, e.g. "D" or "VVS1"'}, 'scale': {'enum': ['colour', 'clarity', 'optical'], 'type': 'string'}}}
mm_to_carat
Carat weight for a given diameter in millimetres. Round brilliant cut.
Input schema 
{'type': 'object', 'required': ['mm'], 'properties': {'mm': {'type': 'number', 'description': 'Diameter in mm, e.g. 6.5'}, 'stone': {'enum': ['moissanite', 'diamond', 'cz'], 'type': 'string', 'default': 'moissanite'}}}
necklace_length
Where a necklace of a given length sits, with the trade name (choker, princess, matinee...).
Input schema 
{'type': 'object', 'required': ['value'], 'properties': {'unit': {'enum': ['inches', 'cm'], 'type': 'string', 'default': 'inches'}, 'value': {'type': 'number'}}}
ring_size_convert
Convert a ring size between US, UK, EU (ISO 8653) and inner diameter in mm. A US 6 is a UK M, not a UK 6.
Input schema 
{'type': 'object', 'required': ['value'], 'properties': {'from': {'enum': ['us', 'uk', 'eu', 'mm'], 'type': 'string', 'default': 'us'}, 'value': {'description': 'Size in the source system, e.g. 7 or "M"'}}}
stud_appearance
How a round stud of a given stone diameter reads on the ear.
Input schema 
{'type': 'object', 'required': ['diameter_mm'], 'properties': {'diameter_mm': {'type': 'number'}}}
History

Recent tool changes

Added
stud_appearance
Sept. 17, 2026, 12:34 p.m.
Added
necklace_length
Sept. 17, 2026, 12:34 p.m.
Added
ring_size_convert
Sept. 17, 2026, 12:34 p.m.
Added
grading_scale
Sept. 17, 2026, 12:34 p.m.
Added
mm_to_carat
Sept. 17, 2026, 12:34 p.m.
Added
carat_to_mm
Sept. 17, 2026, 12:34 p.m.
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