Gem knowledge

Birthstones by month — the video-era gift guide

One stone, one month, one story — birthstones personalise everything.

Birthstones personalise a piece instantly. The modern list with maker's
notes:

Deeper family guides live on this site: garnet,
aquamarine, emerald,
pearl, ruby, peridot,
sapphire, opal,
tanzanite, topaz, and the diamond
4Cs.

Hardness placement (rings vs pendants): the Mohs guide.
Pair the stone with a course gift certificate and the course guide
— the gift that becomes a skill.


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 develop a line of metalsmithed jewellery.”

— Clarie K. (Singapore) · published student feedback

“There is a very wide range of jewellery design programmes. Tanja's an expert and she encourages the class and is also open for catch-ups later.”

— Cecilia O. (Singapore) · published student feedback

Free ways to explore

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

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