Peridot — the green that comes from space and volcanoes

Peridot is gem-quality olivine — an olive-green stone born deep in the
mantle, carried up by volcanoes, and (in rare famous cases) delivered by
meteorites.

The colour — one colour, period: green with olive-to-yellow modulation.
No blue peridot, no colour-change; the evenness of green drives value.

The value play — peridot is plentiful in small sizes but LARGE clean
stones are undervalued relative to their presence; a big vivid peridot
costs a fraction of an equivalent emerald and survives daily wear better
(hardness 6.5-7).

Care — avoid harsh chemicals and hard knocks; it is a touch soft for
careless rings, perfect for pendants and earrings.

Gems with stories like this — mantle, meteorites, single islands — are the
stuff of the webinar library sessions.

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Go deeper — free

Watch the free replays at the gem webinar library — the gem e-book is the written companion. When curiosity becomes commitment, the gemmology foundation course is the ladder's first rung (online entry: GT100e); dates on the calendar. Play Name That Gem to train the eye between sessions.

What students say

“I will use the skills learnt to make jewellery and other items, such as phone chains, christmas tree decorations & hopefully sell them.”

— Nadia W. (England) · published student feedback

“I hope to start and improve my own online shop.”

— Josephyn Y. (Singapore) · published student feedback

Free ways to explore

No sign-up, no payment — start with any of these.

WWatch a free gem webinarFREE
Full recorded sessions — the best free starting point.JJDMIS on YouTubeFREE
Course previews, blended-learning explainers and school life.FFree jewellery webinar replaysFREE
Recorded sessions on design and the jewellery industry.DDownload the gem e-bookFREE
The school's free guide to gems — pairs with the replays.

Keep exploring

Jewellery video library — webinars, replays and free learning resourcesFree jewellery video learning — the gem, jewellery and pearl webinar replay libraries fromOpal — play of colour, care and buyingOpal explained — precious opal's play of colour, body tones, stability and the care rules Garnet — the rainbow family you thought was redGarnet explained — the family from deep red almandine to green tsavorite and colour-changeAquamarine — the sea-blue berylAquamarine explained — the durable blue beryl, how colour saturation drives price, emerald

See the online and blended options

Gemmology can be started fully online, and every classroom course at JDMIS has a video-supported path.

Visit jdmis.edu.sg