I like making the jello the night before. This gives it enough time to set properly. Use four different molds or containers to create varied shapes for the terrazzo effect.
Crush the digestive biscuits until they resemble fine sand. Melt the butter, mix with brown sugar, and combine with crumbs. Press firmly into the springform pan and chill while preparing the filling.
Soak gelatin sheets in cold water. Heat pineapple juice with sugar until it boils, remove from heat, and add the gelatin sheets. Stir until dissolved and cool slightly without letting it set.
Whisk together sour cream, cream cheese, and heavy cream until fluffy. Add the cooled pineapple juice mixture and lemon juice, whisking to combine. The filling should be smooth and airy.
Chop the jello into different-sized pieces. Gently fold into the cream cheese filling to maintain the terrazzo look. Pour the mixture over the chilled biscuit base.
Refrigerate for at least 4 hours. The cheesecake should be firm but creamy, ready to slice beautifully.