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Recently I have been looking into the “Efrat” tcheilis which has come onto the market in the past 7-8 years. It appears almost 100% positive that this techeiles (the snail kind, and not the Radzyner’s squid, which has long been discredited) is the genuine item. I have asked a number of poskim both in YU…

Rav Moshe Taragin The first mishna in the fourth perek of Menachot determines that two components of tzitzit operate independent of each other.  Ideally tzitzit should contain both white stands as well as tekhelet strands.  If either cannot be located, the mitzva can still be performed with the lone alternate colored stands.  As the mishna states, the tekhelet and the white strands are not me’akeiv one another; although they ideally complement each other, the absence of one does…

This is a clarification of the Law concerning the existence of the “Hillazon” even in our time. If we are able to obtain and to dye with it the “Techelet” in order to fulfill the “Mitzvah” of “Tzitzith” completely; so that we may learn to be in awe of G-d through the medium of sight,…

Q: 1) Is Techeiles Chabura (chabureh?) Techeiles supposed to be lighter in shade than Ptil Tekhelet? I have a set which I bought last year and I noticed that the the color is much closer to sky blue, as opposed to my Tallis Gadol strings (Ptil Tekhelet) which are much closer to indigo colored. If…

The Rarest Blue is an example of a book that is worthy of attention both for its literary merit and for its Jewish interest…A story of science and religion, of craft and history. The Rarest Blue is spellbinding, each page a revelation. In lovely, engaging prose, the Stermans reveal the rediscovery of snail indigo—a detective…

https://jewishjournal.com/culture/arts/111794/Judy Taubes Sterman and Baruch StermanThe making of a memorable book requires the skills of an alchemist. Every author starts with the raw material of his or her own experience and expertise, but it can take a certain secret ingredient — passion, vision, inspiration — to transform the dross into gold. That is a fair…