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The BE. Stone Library: 17 Crystal Bracelet Stones at a Glance

One comparison table for 17 crystal-bracelet stones: mineral, chemical formula, Mohs hardness, what gives each its look, and where to start. A material-first reference.

By Sera Marden

In one paragraphBE. works with 17 stones. Most are quartz (SiO2, Mohs 7) wearing different conditions: amethyst, citrine, smoky, rose, clear, rutilated, hematoid, blue smoky, the phantoms and Super Seven. The rest are different materials: obsidian (volcanic glass), moonstone (feldspar), prehnite, kyanite, garnet and aquamarine (beryl). This one table sets them side by side (mineral, formula, hardness and what gives each its look) so you can compare on material.

Crystal names are a tangle of trade terms, colours and overlapping varieties. The fastest way to cut through it is to line everything up by what it actually is. Read down this table and a pattern appears: a large family of quartz, separated only by the trace element, inclusion or radiation that coloured it, and a handful of genuine outsiders with their own chemistry.

The BE. stone library, 17 crystal bracelet stones compared by mineral and hardness. BE.
The BE. stone library: 17 stones grouped by mineral family. Image: BE.
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The BE. stone library, compared

Stone Mineral (formula) Mohs What gives the look
Amethyst Quartz (SiO2) 7 Iron + radiation colour centre → violet.
Citrine Quartz (SiO2) 7 Trace elements and defects → yellow-gold; some is heated amethyst.
Smoky Quartz Quartz (SiO2) 7 Aluminium + radiation → grey to brown.
Rose Quartz Quartz (SiO2) 7 Microscopic fibres → soft pink.
Clear Quartz Quartz (SiO2) 7 No visible colour cause → colourless clarity.
Rutilated Quartz Quartz + rutile (TiO2) 7 Titanium-dioxide needles → gold threads.
Hematoid Quartz Quartz + iron oxide 7 Iron-oxide inclusions → red veils.
Blue Smoky Quartz Quartz, SiO2 7 Tyndall scattering → blue with no pigment.
Emerald Phantom Quartz + fuchsite 7 Fuchsite phantom layers → green ghost.
Green Phantom Quartz + chlorite 7 Chlorite landscapes → layered green.
Super Seven Quartz + varied inclusions 7 Colour zones and inclusions in one quartz body.
Aquamarine Beryl (Be3Al2Si6O18) 7.5–8 Iron → sea-blue; hardest here.
Garnet Garnet group 7–7.5 Iron-rich almandine → deep red.
Moonstone Feldspar 6–6.5 Layered feldspar → adularescent glow.
Prehnite Ca-Al silicate 6–6.5 Iron traces → translucent green.
Kyanite Al2SiO5 5.5–7 Trace iron → blue; two hardnesses.
Obsidian Volcanic glass 5–5.5 Amorphous glass; sheen from inclusions.

How to read the library

  • Family first. Eleven of the seventeen are quartz, with the same hardness, the same care and a different colour mechanism.
  • Colour is a cause, not a label. Each look traces to a trace element, an inclusion, or radiation.
  • Hardness sets the care. The 7+ stones are forgiving; obsidian, moonstone, prehnite and kyanite want gentler handling.
  • Outsiders earn attention. Aquamarine, garnet, moonstone, kyanite and obsidian each bring chemistry the quartz family can’t.
  • Start where the look pulls you. Then confirm hardness and care suit your wear.

The four BE. collections

Beyond mineralogy, BE. groups stones into four philosophical lines: Anchor (grounding, dark stones like obsidian and garnet), Flow (soft, moving stones like moonstone and rose quartz), Prism (light-splitting, included stones like rutilated and hematoid quartz) and Void (deep, contemplative stones like amethyst and kyanite). The collection is a way to choose by feeling once the material facts are clear.

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How BE. grades every stone

Whatever the mineral, BE. reads each strand against the Crystal 4T framework (Transparency, Tone, Texture, Treasure) and ships it with a Stone Origin Record recording mineral, hardness and source. The library above is the short version of that record, gathered in one place.

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Related reading

Frequently asked questions

Q1.How many of these stones are quartz?

Eleven of the seventeen. Amethyst, citrine, clear, rose, smoky, rutilated, hematoid, blue smoky, the phantoms and Super Seven are all quartz or quartz-based at SiO2, Mohs 7. Obsidian, moonstone, prehnite, kyanite, garnet and aquamarine are different materials.

Q2.Which stone is the hardest?

Aquamarine, a beryl at Mohs 7.5–8. Almandine garnet follows at 7–7.5, the quartz family at 7, and obsidian is the softest of the seventeen at 5–5.5.

Q3.What makes each crystal a different colour?

Trace elements, inclusions or radiation. Iron and radiation make amethyst violet; rutile needles make rutilated quartz golden; iron oxide makes hematoid red; feldspar structure makes moonstone glow.

Q4.Is obsidian a crystal?

No. It is a natural volcanic glass, amorphous with no lattice, which is why it breaks with a conchoidal fracture. It is included because it is widely worn as a bracelet stone.

Q5.Which stone should a beginner choose?

A Mohs 7 quartz such as clear quartz, amethyst or smoky quartz is the most forgiving. Choose by the colour and material story you connect with, then check hardness and care.

Q6.Why list the chemical formula?

The formula shows what a stone actually is. Knowing amethyst, citrine and smoky quartz are all SiO2 explains why they share hardness and care, and why heat can change the colour of some amethyst and smoky quartz.

References