Amber is not a stone, a sap, or a gem in the usual sense. It is fossilized tree resin - and the difference between resin, copal, and amber is time, pressure, and chemistry doing slow arithmetic across geological ages.
From Wound to Resin
It starts with an injured tree. Pines and their relatives exude resin to seal wounds against insects and infection, and in the right forests - Baltic shorelines, Myanmar's Hukawng Valley, the Dominican jungles - that resin flowed in serious quantities tens of millions of years ago. Sticky, aromatic, and impossible to wash off, it trapped whatever it touched: ants mid-argument, leaves, feathers, whole chapters of a forest floor.
The Fossilization
Buried under sediment, the resin spends ages under gentle heat and pressure. Volatile compounds evaporate. The resin's molecules - terpenes like communic acid - cross-link and polymerize into larger, more stable structures. Over millions of years the material transforms: it hardens, its surface develops the crazed network of fine cracks collectors love, and it becomes chemically inert - insoluble, un-reactive, permanent. Amber is what resin becomes when the chemistry finishes. Baltic amber is roughly 40 million years old; Burmese amber is nearly a hundred million, old enough to have trapped dinosaurs' world.
The In-Between: Copal
Young, half-fossilized resin - thousands to a couple million years old - is called copal. Same family, same chemistry, nowhere near done. Copal is sticky, softens under a warm needle, and fizzes where true amber doesn't. It is the most common amber impersonator not because it pretends well, but because buyers assume "old" without asking how old. The home tests (salt water, UV fluorescence, static) live on Authenticity Guides.
Why It Looks the Way It Looks
Color tracks chemistry and time: the famous Baltic honey tones come from oxidation and the forest's own recipe; "blood" amber's deep red from long oxidation near the surface; Dominican blue amber from a particular hydrocarbon structure that fluoresces. Internal bubbles scatter light into the cloudy, glowing "beeswax" look - and why, over years on a wrist, skin oils and gentle oxidation genuinely deepen the color. Your amber is slowly continuing the fossilization it started before the Himalayas rose.
The One Honest Exception: Pressed Amber
Some amber is ground to powder and pressed into blocks with heat - no polymer, no plastic, genuinely amber, just reconstituted. It is legal, common in inexpensive pieces, and legitimate when labeled. Ours says so when it is.
Related: Amber · Authenticity Guides · Caring for Amber · Claims We Don't Make