The Mulu experience

When were you born?

We show you the sky you were born under, your lunar year and your stones. Just the date.

Real star positions, calculated for your date. Nothing is saved.

Sources and method

Sources and method.

Gem properties describe materials. Chakra and intention pairings are symbolic traditions and Mulu design choices, not measured energy or medical effects. Stones are not proven to treat disease or improve sleep.

Planetary positions are calculated with Astronomy Engine, validated against JPL ephemerides. Stars use a fixed J2000 catalogue. Tropical signs are equal 30° sectors; the IAU constellations have different borders. Chinese years begin at Lunar New Year from Hong Kong Observatory tables. Stone pairings are our design vocabulary.

GIA · mineral properties, care & birthstonesGem science GIA · the twelve birth monthsBirthstone convention Mindat / Hudson Institute of MineralogyMineralogy NASA JPL · Horizons ephemerisAstronomical reference Astronomy Engine · algorithms and validationCalculation engine Hong Kong Observatory · lunar calendars 1901–2100Calendar reference D3 Celestial · star coordinates & constellation figuresStar atlas · BSD-3-Clause Crystal study · placebo-controlled trial, 138 adults (2025)Health evidence

Earth imagery: NASA/GSFC Scientific Visualization Studio, Blue Marble (Reto Stöckli). Stone imagery is illustration; only testing can authenticate an individual stone.