FITINY Moissanite Tools
Officialmoissanite-tools

莫桑石的分级参考与克拉↔毫米换算——计算得出,而非复制。
为什么会有这个项目
网上几乎每张克拉/毫米对照表都是按钻石计算的。莫桑石的密度不同(3.21 对 3.52 g/cm³),因此把钻石对照表套用到莫桑石上会有约 9% 的误差:
直径 | 钻石 | 莫桑石 | 立方氧化锆 |
4.0 mm | 0.24 ct | 0.22 ct | 0.39 ct |
5.0 mm | 0.47 ct | 0.43 ct | 0.76 ct |
6.5 mm | 1.03 ct | 0.94 ct | 1.66 ct |
8.0 mm | 1.91 ct | 1.74 ct | 3.09 ct |
这就是为什么莫桑石通常按毫米而非克拉出售——同样的“1 克拉”在不同宝石上看起来大小不同。
Related MCP server: huetension mcp
这里有什么
data/grading.json GIA colour (D–K) and clarity (FL–SI) scales, plus published
optical constants for moissanite / diamond / cubic zirconia
data/sizing.json ISO 8653 ring sizes (US/UK/EU/mm), necklace lengths, stud sizes
src/conversion.js carat ↔ mm for round brilliant cut, density-corrected
src/sizing.js ring size conversion, necklace length and stud appearance lookups
mcp/server.js Model Context Protocol server exposing all of the above戒指尺寸
跨境购买戒指容易出错,因为各体系互不关联:美码 6 号是英码 M,而不是英码 6 号。ISO 8653 下的欧盟尺寸就是内周长(毫米)。
US | UK | EU | 内径 |
5 | J | 49.3 | 15.7 mm |
6 | M | 51.9 | 16.5 mm |
7 | O | 54.4 | 17.3 mm |
8 | Q | 57.0 | 18.1 mm |
9 | R½ | 59.5 | 18.9 mm |
不在表上的尺寸会返回最接近的已列尺寸,并标记 exact: false,而不是凭空生成一个值。
用法
import { caratFromMm, mmFromCarat, compareAtWeight } from './src/conversion.js';
mmFromCarat(1, 'moissanite'); // 6.65 mm
mmFromCarat(1, 'diamond'); // 6.45 mm
caratFromMm(6.5, 'moissanite'); // 0.94 ct
compareAtWeight(1);
// { carat: 1, moissanite_mm: 6.65, diamond_mm: 6.45, cz_mm: 5.49 }MCP 服务器
有两种运行方式。
托管版——无需安装。 将任意 MCP 客户端指向:
https://mcp.fitiny.com/mcp已列入官方 MCP Registry,名称为 com.fitiny/moissanite-tools。
本地版——stdio:
node mcp/server.js提供六个工具:
工具 | 回答 |
| 1 克拉莫桑石有多宽? |
| 一颗 6.5 mm 的宝石在各材质中各重多少? |
| VVS1 / D 色到底意味着什么? |
| 英码 M 对应美码几号? |
| 18 英寸项链戴在什么位置? |
| 6 mm 耳钉在耳朵上看起来有多大? |
数学原理
GIA 的圆形明亮式切割公式,按相对密度缩放:
weight_ct = diameter_mm² × depth_mm × 0.0061 × (ρ_stone / ρ_diamond)
depth_mm = diameter_mm × 0.612 (average depth ratio, well-cut round)与已发布的钻石对照表相比,准确度为:平均 1.4%,最大 3.3%。真实宝石会因切工比例而异——请将输出结果作为参考,而非替代实际称重。
仅适用于圆形明亮式。 花式切工(椭圆形、公主方形、祖母绿形、梨形)的重量分布不同,需要此处未包含的特定形状系数。
关于数据
颜色和净度等级遵循莫桑石行业所采用的 GIA 钻石分级体系。光学常数(折射率、色散、莫氏硬度、密度)均为已发表的宝石学数值。这里没有任何内容是从其他网站抓取的——换算数据均由上述公式计算得出,因此可以按 MIT 许可发布。
这是描述性参考,而非认证。经过分级的宝石会附带宝石学实验室出具的报告;本仓库只是解释这些等级的含义。
在线工具
交互式版本运行在 fitiny.com/pages/moissanite-grading。
许可证
MIT——参见 LICENSE。由 FITINY Jewelry 维护。
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