Most Singapore museums charge entry; this one asks only that you register ahead. The Gem Museum, a small private institution at 9 Perak Road near Rochor MRT, has been quietly running since 2015, and general admission costs nothing. What you get for free is a solid grounding in how gemstones form, get mined, cut, polished and priced — the museum calls it 'Mine to Market to Memories'.

Level 1 holds the core exhibition, laid out so you can wander at your own pace, or you can tag onto a free guided tour on Tuesdays and Thursdays, 2pm to 3pm, if you'd like someone to explain the specimens. Upstairs, the Gem Lab offers a peek at how gemologists actually identify stones.

The paid extras are where it gets fun. The Space Glow Room, $12 for adults, puts minerals under ultraviolet light to reveal colours invisible in normal lighting — red-fluorescing spinel is the star. The geode-breaking experience costs $18 for one or $30 for two: you pick a geode, split it open and check out the crystals inside, then take it home. Polishing a small piece adds $8.

If you want to go deeper, workshops run at $58 each. The Gem Discovery series covers how quality and value are assessed, and a Crystal Appreciation session takes a closer look at crystals through observation. A newer three-part programme, The Value Lab, is led by co-founder Sarah Loke Hui Ying and uses gemstones to explore how people judge worth and make decisions. Kids are covered too: the Junior Rockstar programmes introduce children to gemology, seasonal camps offer hands-on specimen work, and cheap craft options like Gem Art ($10 a set) and Rock Art ($8 a piece) give families something to bring home. Schools, corporate groups and private parties can arrange custom visits.

There's a genuine family story behind the place. Kunming and Hui Ying founded the museum together in 2015, drawing on the collection and expertise of Kunming's father, Tay Thye Sun, who set up the Far East Gem Research Institute. The museum shop rounds things off with gemstones, minerals and gem-inspired souvenirs.

Why bother adding it to a Singapore itinerary? It's cheap, indoor, close to the city centre and genuinely hands-on — a good option for a rainy afternoon, a curious teenager or anyone who's ever wondered what a geode looks like inside. Hours are limited: Tuesday to Friday from 12pm to 5pm and Saturday 11am to 3pm, closed Sunday and Monday. Entry is free but you must register in advance, and tours and workshops need separate bookings. If you're in the Little India or Rochor area anyway, it slots neatly into a day of exploring the neighbourhood.