Earthy browns and green across a druzy surface. No flowers on this one.
The brown is iron oxide. Where water moving through the cavity carried iron and left it behind on the crystal surfaces, you get the rust tones, and where it carried iron into the quartz structure instead, you get purple. Same element, two entirely different outcomes depending on whether it ended up on the crystal or in it.
This is the ordinary end of what these cavities produce, and it is worth having for exactly that reason. The showpiece geodes and this piece came out of the same basalt by the same process. The difference is chemistry and luck, not quality.
Keep it out of direct sunlight. Sustained UV breaks down the iron centres that produce the purple, and amethyst that fades does not come back.
Mineral: Amethyst, the purple variety of quartz (SiO₂), with celadonite
Crystal system: Trigonal
Origin: Rio Grande do Sul, Brazil
Hardness: 7 on the Mohs scale; hard, though fine druzy points chip easily
Treatment: None
Dimensions: 6 x 4 x 10.5 cm
Weight: 100 g Note: Supplied on a bespoke gold stand
You will receive the exact piece photographed.