Glossary
Short, checkable definitions for terms used across the tools and guides.
- CC0
- A Creative Commons dedication that waives copyright to the extent possible, allowing reuse without conditions.
- CDR
- CorelDRAW’s proprietary native format. It cannot be created by open tools, so Heartline Works offers it only when a real file exists. Guide
- Density
- Mass per unit volume, usually g/cm³. It links the volume of a model to its weight in a given metal. Tool: Metal Density Calculator Guide
- Duplicate path
- Two identical paths stacked on top of each other, which makes a laser cut the same line twice. Guide
- DXF
- Drawing Exchange Format: a CAD interchange format widely accepted by laser and CNC software. Guide
- Fineness
- Purity expressed in parts per thousand: 750 fineness means 75% pure metal. Tool: Karat & Purity Calculator Guide
- Karat (K)
- A measure of gold purity in 24ths by weight. 24K is nominally pure; 18K is 18/24 = 75% gold. Tool: Karat & Purity Calculator Guide
- Kerf
- The width of material removed by a cutting process such as a laser beam or a router bit. Guide
- Lost-wax casting
- A process in which a wax or resin pattern is invested in plaster, burned out, and the cavity is filled with molten metal. Tool: Casting Weight Calculator Guide
- Making charge
- The fee a jeweller adds for labour and overhead, charged per gram, as a percentage, or as a flat amount. Tool: Jewelry Metal Value Calculator Guide
- Mid-market rate
- A reference exchange rate between buy and sell rates. Banks and transfer services add a margin to it. Tool: Currency Converter Guide
- Node
- A point on a vector path where segments join. The number of nodes is one measure of a design’s complexity.
- Open path
- A path whose end does not meet its start. Fine for engraving lines; usually a problem for closed cut shapes. Guide
- Pennyweight (dwt)
- A troy unit equal to 1/20 of a troy ounce (1.55517384 g). Tool: Weight & Unit Converter Guide
- Public domain
- Works whose copyright has expired or never applied. Rules vary by country, so the source’s statement is recorded.
- Reference metal value
- The value of a piece’s metal content at the spot price. It excludes premiums, making charges, wastage and tax. Tool: Gold Value Calculator Guide
- Spot price
- The benchmark price for immediate delivery of one troy ounce of a metal, quoted in US dollars. Tool: Gold Price Calculator Guide
- Sprue
- The channel through which molten metal flows into a casting mould. Its metal is part of the pour weight. Tool: Casting Weight Calculator Guide
- SVG
- Scalable Vector Graphics: an open XML-based vector format that keeps curves as curves. Guide
- Tola
- A traditional South Asian unit of mass used for gold and silver. This site uses 11.6638038 g (3/8 of a troy ounce). Tool: Weight & Unit Converter Guide
- Tracing
- Converting a raster image to vector paths. It is an interpretation of the pixels, so traced designs are flagged and reviewed.
- Troy ounce
- The unit used for quoting precious metals: exactly 31.1034768 grams. Tool: Weight & Unit Converter Guide
- Vector graphic
- An image defined by paths and curves rather than pixels, so it scales without losing sharpness. Guide
- Wastage
- An allowance for metal lost during making, usually a percentage of the item’s weight. Tool: Jewelry Metal Value Calculator Guide