A good question is worth sharing
You have a specimen in front of you and something about it doesn't quite fit the label. Perhaps there is a second mineral that hasn't been named, or the crystals look different from the photograph in your book. Do you put it back in the drawer, or ask someone?
Australian collections offer plenty of opportunities for these questions. An old Broken Hill piece may have several minerals together. A specimen from a Victorian locality may carry a name written many years ago. Sometimes the information is perfectly sound but unfamiliar to us. Sometimes it needs checking. Either way, taking a little time to understand the question is more useful than trying to produce the quickest answer.
Start with what you actually know. Read the whole label, including the back, and keep it with the specimen. Is the locality recorded by mine, town or only by state? Is there a collector's number? If you were given the piece, distinguish what you were told from what was written down. "Thought to be from" carries a different meaning from a documented collection locality, and it's helpful to retain that wording.
When you show the specimen to someone else, an overall photograph helps them see how the different parts relate. A closer view can then draw attention to the feature you're asking about. Include a measurement, use light that shows the colour as faithfully as possible, and explain which part interests you. If the pale crystals are the question, say so; otherwise, three people may offer answers about three different things.
A picture may still leave the matter unsure. That is quite normal. Minerals can resemble one another, and colour alone often doesn't settle the matter. Someone may be able to suggest possibilities or explain which feature would help distinguish them. Sometimes a reliable identification needs examination or analysis beyond what can be offered from photographs. It is useful to know where that limit lies.
There is no need to scratch, break or apply chemicals to a valued specimen to move a question forward. Begin with observation and the information already available. If further testing seems worthwhile, ask someone with the appropriate knowledge what would be useful and whether it could damage the piece. An unresolved name is preferable to an unnecessarily damaged crystal and an answer that is still uncertain.
There is a great deal to learn by comparing documented material. Museum collections and mineral references are good places to start. Museums Victoria, for example, records chabazite from Flinders in Victoria. Finding that record establishes an occurrence; it doesn't identify every similar-looking crystal from the district. Learning to make that distinction is part of becoming more confident with mineral information.
An experienced collector can help by explaining their reasoning. What feature drew them towards that identification? Is it the crystal shape, the association, or information about the locality? A short explanation gives everyone something they can use next time. If someone else offers a different view, the evidence can be compared without anyone feeling they have caused an argument.