The phrase "although it is lost" is correct and usable in written English.
It can be used to introduce a contrast or exception regarding something that has been lost, often in a reflective or philosophical context.
Example: "The treasure was never found, although it is lost to time and memory."
Alternatives: "even though it is gone" or "despite being lost".
For that which is absorbed by the minute parts is not absolutely lost for the universe, although it is lost for the total force of the concurrent bodies" (GM VI.230/Langley 670).
In this way, he tells us "that which is absorbed by the minute parts is not absolutely lost for the universe, although it is lost for the total force of the concurrent bodies" (GM VI.231/Langley 670).
It is perhaps the only P450 protein family whose members are spread across all biological kingdoms, although it is lost in certain lineages including insects and worms which do not perform de novo sterol biosynthesis.
The approach today is mainstream; the Obama administration says it is firmly pursuing it, although it is losing favor among Israelis and Palestinians as both have come to view the other as insincere and warlike.
It has a vibrant history of excellent live music, although it's lost a little cachet in recent years to places such as the Thekla and by relying on tribute acts and cover bands.
Although it's losing share in Europe, Apple has been gaining in India.
Ah, yes, incarceration: what an agreeable and strengthening experience it is, like a nice hot cup of herbal tea, although, sadly, it is lost on Ingrid's cellmate, who has "a vocabulary of twenty-five words".
Although the portrait is lost, it is known through several 16th-century imitations, as well as a surviving sketch.
The main disadvantage of the OIDP is that it cannot be self-completed and requires a calibrated interviewer to apply it, whereas the OSS is very simple to use and is able to measure both good and poor well-being rather than just poor, although relevant information is lost because it is a unidimensional scale.
Although cohesion is lost prematurely in meiosis I, it is in anaphase I, after the homologs have segregated.
Although detail is lost in the Met's cavernous house, Mr. Taylor's images capture this ambivalence.
